History of smallpox
The history of smallpox extends into pre-history, with the disease probably emerging in human populations about 10,000 BC. The earliest credible evidence of smallpox is found in the Egyptian mummies of people who died some 3,000 years ago. Smallpox has had a major impact on world history, not least because indigenous populations of regions where smallpox was non-native, such as the Americas and Australia, were rapidly and greatly reduced by smallpox (along with other introduced diseases) during periods of initial foreign contact, which helped pave the way for conquest and colonization. During the 18th century the disease killed an estimated 400,000 Europeans each year, including five reigning monarchs, and was responsible for a third of all blindness. Between 20 and 60% of all those infected—and over 80% of infected children—died from the disease.
During the 20th century, it is estimated that smallpox was responsible for 300–500 million deaths. In the early 1950s an estimated 50 million cases of smallpox occurred in the world each year. As recently as 1967, the World Health Organization estimated that 15 million people contracted the disease and that two million died in that year. After successful vaccination campaigns throughout the 19th and 20th centuries, the WHO certified the global eradication of smallpox in December 1979. Smallpox is one of two infectious diseases to have been eradicated, the other being rinderpest, which was declared eradicated in 2011.
It has been suggested that smallpox was a major component of the Plague of Athens that occurred in 430 BCE, during the Peloponnesian Wars, and was described by Thucydides. Galen's description of the Antonine Plague, which swept through the Roman Empire in 165–180 CE, indicates that it was probably caused by smallpox. Returning soldiers brought the disease home with them to Syria and Italy, where it raged for fifteen years and greatly weakened the Roman empire, killing up to one-third of the population in some areas. Total deaths have been estimated at 5 million. A second major outbreak of disease in the Roman Empire, known as the Plague of Cyprian (251–266 CE), was also either smallpox or measles. The Roman empire stopped growing as a consequence on these two plagues, according to historians like Theodore Mommsen. Although some historians believe that many historical epidemics and pandemics were early outbreaks of smallpox, contemporary records are not detailed enough to make a definite diagnosis.
Around 400 CE, an Indian medical book[which?] recorded a disease marked by pustules and boils, saying "the pustules are red, yellow, and white and they are accompanied by burning pain … the skin seems studded with grains of rice." The Indian epidemic was thought to be punishment from a god, and the survivors created a goddess, Sitala, as the anthropomorphic personification of the disease. Smallpox was thus regarded as possession by Sitala. In Hinduism the goddess Sitala both causes and cures high fever, rashes, hot flashes and pustules. All of these are symptoms of smallpox.
Most of the details about the epidemics are lost, probably due to the scarcity of surviving written records from the Early Middle Ages. The first incontrovertible description of smallpox in Western Europe occurred in 581 CE, when Bishop Gregory of Tours provided an eyewitness account describing the characteristic symptoms of smallpox. Waves of epidemics wiped out large rural populations. The establishment of the disease in Europe was of special importance, for this served as the endemic reservoir from which smallpox spread to other parts of the world, as an accompaniment of successive waves of European exploration and colonization.
The clearest description of smallpox from pre-modern times was given in the 9th century by the Persian physician, Muhammad ibn Zakariya ar-Razi, known in the West as "Rhazes", who was the first to differentiate smallpox from measles and chickenpox in his Kitab fi al-jadari wa-al-hasbah (The Book of Smallpox and Measles).
Smallpox was a leading cause of death in the 18th century. Every seventh child born in Russia died from smallpox. It killed an estimated 400,000 Europeans each year in the 18th century, including five reigning European monarchs. Most people became infected during their lifetimes, and about 30% of people infected with smallpox died from the disease, presenting a severe selection pressure on the resistant survivors.
The Franco-Prussian War triggered a smallpox pandemic of 1870–1875 that claimed 500,000 lives; while vaccination was mandatory in the Prussian army, many French soldiers were not vaccinated. Smallpox outbreaks among French prisoners of war spread to the German civilian population and other parts of Europe. Ultimately, this public health disaster inspired stricter legislation in Germany and England, though not in France
In 1849 nearly 13% of all Calcutta deaths were due to smallpox. Between 1868 and 1907, there were approximately 4.7 million deaths from smallpox in India. Between 1926 and 1930, there were 979,738 cases of smallpox with a mortality of 42.3%.
Smallpox is exogenous to Africa. One of the oldest records of what may have been an encounter with smallpox in Africa is associated with the elephant war circa AD 568 CE, when after fighting a siege in Mecca, Ethiopian troops contracted the disease which they carried with them back to Africa.
Arab ports in Coastal towns in Africa likely contributed to the importation of smallpox into Africa, as early as the 13th century, though no records exist until the 16th century. Upon invasion of these towns by tribes in the interior of Africa, a severe epidemic affected all African inhabitants while sparing the Portuguese. Densely populated areas of Africa connected to the Mediterranean, Nubia and Ethiopia by caravan route likely were affected by smallpox since the 11th century, though written records do not appear until the introduction of the slave trade in the 16th century.
The enslavement of Africans continued to spread smallpox to the entire continent, with raiders pushing farther inland along caravan routes in search of people to enslave. The effects of smallpox could be seen along caravan routes, and those who were not affected along the routes were still likely to become infected either waiting to be put onboard or on board ships.
Smallpox in Angola was likely introduced shortly after Portuguese settlement of the area in 1484. The 1864 epidemic killed 25,000 inhabitants, one third of the total population in that same area. In 1713, an outbreak occurred in South Africa after a ship from India docked at Cape Town, bringing infected laundry ashore. Many of the settler European population suffered, and whole clans of the Khoisan people were wiped out. A second outbreak occurred in 1755, again affecting both the white population and the Khoisan. The disease spread further, completely eradicating several Khosian clans, all the way to the Kalahari desert. A third outbreak in 1767 similarly affected the Khoisan and Bantu peoples. But the European colonial settlers were not affected nearly to the extent that they were in the first two outbreaks, it has been speculated this is because of variolation. Continued enslavement operations brought smallpox to Cape Town again in 1840, taking the lives of 2500 people, and then to Uganda in the 1840s. It is estimated that up to eighty percent of the Griqua tribe was exterminated by smallpox in 1831, and whole tribes were being wiped out in Kenya up until 1899. Along the Zaire river basin were areas where no one survived the epidemics, leaving the land devoid of human life. In Ethiopia and the Sudan, six epidemics are recorded for the 19th century: 1811–1813, 1838–1839, 1865–1866, 1878–1879, 1885–1887, and 1889–1890.
Epidemics in the Americas
|1520–1527||Mexico, Central America, South America||Smallpox kills millions of native inhabitants of Mexico. Unintentionally introduced at Veracruz with the arrival of Panfilo de Narvaez on April 23, 1520 and was credited with the victory of Cortes over the Aztec empire at Tenochtitlan (present-day Mexico City) in 1521. Kills the Inca ruler, Huayna Capac, and 200,000 others and weakens the Incan Empire.|
|1561–1562||Chile||No precise numbers on deaths exist in contemporary records but it is estimated that natives lost 20 to 25 percent of their population. According to Alonso de Góngora Marmolejo, so many Indian laborers died that the Spanish gold mines had to shut down.|
|1588–1591||Central Chile||A combined smallpox, measles and typhus plague strikes Central Chile contributing to a decline of indigenous populations.|
|1617–1619||North America northern east coast||Killed 90% of the Massachusetts Bay Indians|
|1655||Chillán, Central Chile||An outbreak of smallpox occurred among refugees from Chillán as the city was evacuated amidst the Mapuche uprising of 1655. Spanish authorities put this group in effective quarantine decreeing death sentences for anyone crossing Maule River north.|
|1674||Cherokee Tribe||Death count unknown. Population in 1674 about 50,000. After 1729, 1738, and 1753 smallpox epidemics their population was only 25,000 when they were forced to Oklahoma on the Trail Of Tears.|
|1702–1703||St. Lawrence Valley, NY|
|1721||Boston, MA||A British sailor disembarking the HMS Seahorse brought smallpox to Boston. 5759 people were infected and 844 died.|
|1770s||West Coast of North America||At least 30% (tens of thousands) of the Northwestern Native Americans die from smallpox|
|1830s||Alaska||Reduced Dena'ina Athabaskan population in Cook Inlet region of southcentral Alaska by half. Smallpox also devastated Yup'ik Eskimo populations in western Alaska.|
|1836–1840||Great Plains||1837 Great Plains smallpox epidemic|
|1862||British Columbia, Washington state & Russian America||Known as the Great Smallpox of 1862, an outbreak of smallpox in a large encampment of all indigenous peoples from around the colony on June 10, 1862, dispersed by order of the government to return to their homes, resulted in the deaths of 50-90% of the indigenous peoples in the region|
|1865–1873||Philadelphia, PA, New York, Boston, MA and New Orleans, LA||Same period of time, in Washington D.C., Baltimore, MD, Memphis, TN, Cholera and a series of recurring epidemics of Typhus, Scarlet Fever and Yellow Fever|
|1869||Araucanía, southern Chile||A smallpox epidemic breaks out among native Mapuches, just some months after a destructive Chilean military campaign in Araucanía.|
|1877||Los Angeles, CA|
|1880||Tacna, Peru||Tacna hosted the combined armies of Peru and Bolivia before being defeated by Chile in the Battle of Tacna. Before it fell to Chileans in late May 1880 infectious diseases were widespread in the city with 461 deaths of smallpox in the 1879-1880 period, making up 11.3% of all registered deaths for the city in the same period.|
|1902||Boston, Massachusetts||Of the 1,596 cases reported in this epidemic, 270 died.|
After first contacts with Europeans and Africans, some believe that the death of 90–95% of the native population of the New World was caused by Old World diseases. It is suspected that smallpox was the chief culprit and responsible for killing nearly all of the native inhabitants of the Americas. For more than 200 years, this disease affected all new world populations, mostly without intentional European transmission, from contact in the early 16th century until possibly as late as the French and Indian Wars (1754–1767).
In 1519 Hernán Cortés landed on the shores of what is now Mexico and what was then the Aztec Empire. In 1520 another group of Spanish arrived in Mexico from Hispaniola, bringing with them the smallpox which had already been ravaging that island for two years. When Cortés heard about the other group, he went and defeated them. In this contact, one of Cortés's men contracted the disease. When Cortés returned to Tenochtitlan, he brought the disease with him.
Soon, the Aztecs rose up in rebellion against Cortés and his men. Outnumbered, the Spanish were forced to flee. In the fighting, the Spanish soldier carrying smallpox died. Cortés would not return to the capital until August 1521. In the meantime smallpox devastated the Aztec population. It killed most of the Aztec army and 25% of the overall population. The Spanish Franciscan Motolinia left this description: "As the Indians did not know the remedy of the disease…they died in heaps, like bedbugs. In many places it happened that everyone in a house died and, as it was impossible to bury the great number of dead, they pulled down the houses over them so that their homes become their tombs." On Cortés's return, he found the Aztec army’s chain of command in ruins. The soldiers who still lived were weak from the disease. Cortés then easily defeated the Aztecs and entered Tenochtitlán. The Spaniards said that they could not walk through the streets without stepping on the bodies of smallpox victims.
The effects of smallpox on Tahuantinsuyu (or the Inca empire) were even more devastating. Beginning in Colombia, smallpox spread rapidly before the Spanish invaders first arrived in the empire. The spread was probably aided by the efficient Inca road system. Within months, the disease had killed the Incan Emperor Huayna Capac, his successor, and most of the other leaders. Two of his surviving sons warred for power and, after a bloody and costly war, Atahualpa become the new emperor. As Atahualpa was returning to the capital Cuzco, Francisco Pizarro arrived and through a series of deceits captured the young leader and his best general. Within a few years smallpox claimed between 60% and 90% of the Inca population, with other waves of European disease weakening them further. A handful of historians argue that a disease called Bartonellosis might have been responsible for some outbreaks of illness, but this opinion is in the scholarly minority. The effects of Bartonellosis were depicted in the ceramics of the Moche people of ancient Peru.
Even after the two largest empires of the Americas were defeated by the virus and disease, smallpox continued its march of death. In 1561, smallpox reached Chile by sea, when a ship carrying the new governor Francisco de Villagra landed at La Serena. Chile had previously been isolated by the Atacama Desert and Andes Mountains from Peru, but at the end of 1561 and in early 1562, it ravaged the Chilean native population. Chronicles and records of the time left no accurate data on mortality but more recent estimates are that the natives lost 20 to 25 percent of their population. The Spanish historian Marmolejo said that gold mines had to shut down when all their Indian labor died. Mapuche fighting Spain in Araucanía regarded the epidemic as a magical attempt by Francisco de Villagra to exterminate them because he could not defeat them in the Arauco War.
In 1633 in Plymouth, Massachusetts, the Native Americans were struck by the virus. As it had done elsewhere, the virus wiped out entire population groups of Native Americans. It reached Mohawks in 1634, the Lake Ontario area in 1636, and the lands of the Iroquois by 1679.
A particularly virulent sequence of smallpox outbreaks took place in Boston, Massachusetts. From 1636 to 1698, Boston endured six epidemics. In 1721, the most severe epidemic occurred. The entire population fled the city, bringing the virus to the rest of the Thirteen Colonies.
During the siege of Fort Pitt, as recorded in his journal by sundries trader and militia Captain, William Trent, on June 24, 1763, dignitaries from the Delaware tribe met with Fort Pitt officials, warned them of "great numbers of Indians" coming to attack the fort, and pleaded with them to leave the fort while there was still time. The commander of the fort refused to abandon the fort. Instead, the British gave as gifts two blankets, one silk handkerchief and one linen from the smallpox hospital, to two Delaware Indian delegates. The dignitaries were met again later and they seemingly hadn't contracted smallpox. A relatively small outbreak of smallpox had begun spreading earlier that spring, with a hundred dying from it among Native American tribes in the Ohio Valley and Great Lakes area through 1763 and 1764. The effectiveness of the biological warfare itself remains unknown, and the method used is inefficient compared to respiratory transmission and these attempts to spread the disease are difficult to differentiate from epidemics occurring from previous contacts with colonists, as smallpox outbreaks happened every dozen or so years.
In the late 1770s, during the American Revolutionary War, smallpox returned once more and killed thousands. Peter Kalm in his Travels in North America, described how in that period, the dying Indian villages became overrun with wolves feasting on the corpses and weakened survivors. During the 1770s, smallpox killed at least 30% of the Northwestern Native Americans, killing tens of thousands. The smallpox epidemic of 1780–1782 brought devastation and drastic depopulation among the Plains Indians. This epidemic is a classic instance of European immunity and non-European vulnerability. It is probable that the Indians contracted the disease from the ‘Snake Indians’ on the Mississippi. From there it spread eastward and northward to the Saskatchewan River. According to David Thompson’s account, the first to hear of the disease were fur traders from the Hudson’s House on October 15, 1781. A week later, reports were made to William Walker and William Tomison, who were in charge of the Hudson and Cumberland Hudson’s Bay Company posts. By February, the disease spread as far as the Basquia Tribe. Smallpox attacked whole tribes and left few survivors. E. E. Rich described the epidemic by saying that “Families lay unburied in their tents while the few survivors fled, to spread the disease.” After reading Tomison’s journals, Houston and Houston calculated that, of the Indians who traded at the Hudson and Cumberland houses, 95% died of smallpox. Paul Hackett adds to the mortality numbers suggesting that perhaps up to one half to three quarters of the Ojibway situated west of the Grand Portage died from the disease. The Cree also suffered a casualty rate of approximately 75% with similar effects found in the Lowland Cree. By 1785 the Sioux Indians of the great plains had also been affected. Not only did smallpox devastate the Indian population, it did so in an unforgiving way. William Walker described the epidemic stating that “the Indians [are] all Dying by this Distemper … lying Dead about the Barren Ground like a rotten sheep, their Tents left standing & the Wild beast Devouring them.”
In 1799, the physician Valentine Seaman administered the first smallpox vaccine in the United States. He gave his children a smallpox vaccination using a serum acquired from Edward Jenner, the British physician who invented the vaccine from fluid taken from cowpox lesions. Though vaccines were misunderstood and mistrusted at the time, Seaman advocated their use and, in 1802, coordinated a free vaccination program for the poor in New York City.
In 1900 starting in New York City, smallpox reared its head once again and started a sociopolitical battle with lines drawn between the rich and poor, white and black. In populations of railroad and migrant workers who traveled from city to city the disease had reached an endemic low boil. This fact did not bother the government at the time, nor did it spur them to action. Despite the general acceptance of the germ theory of disease, pioneered by John Snow in 1849, smallpox was still thought to be mostly a malady that followed the less-distinct guidelines of a "filth" disease, and therefore would only affect the "lower classes".
The last major smallpox epidemic in the United States occurred in Boston, Massachusetts throughout a three-year period, between 1901 and 1903. During this three-year period, 1596 cases of the disease occurred throughout the city. Of those cases, nearly 300 people died. As a whole, the epidemic had a 17% fatality rate.
Those who were infected with the disease were detained in quarantine facilities in the hopes of protecting others from getting sick. These quarantine facilities, or pesthouses, were mostly located on Southampton Street. As the outbreak worsened, men were also moved to hospitals on Gallop’s Island. Women and children were primarily sent to Southampton Street. Smallpox patients were not allowed in regular hospital facilities throughout the city, for fear the sickness would spread among the already sick.
A reflection of the previous outbreak that occurred in New York, the poor and homeless were blamed for the sickness's spread. In response to this belief, the city instructed teams of physicians to vaccinate anyone living in inexpensive housing.
In an effort to control the outbreak, the Boston Board of Health began voluntary vaccination programs. Individuals could receive free vaccines at their workplaces or at different stations set up throughout the city. By the end of 1901, some 40,000 of the city’s residents had received a smallpox vaccine. However, despite the city's efforts, the epidemic continued to grow. In January 1902, a door-to-door vaccination program was initiated. Health officials were instructed to compel individuals to receive vaccination, pay a $5 fine, or face 15 days in prison. This door-to-door program was met by some resistance as some individuals feared the vaccines to be unsafe and ineffective. Others felt compulsory vaccination in itself was a problem that violated an individual's civil liberties.
This program of compulsory vaccination eventually led to the famous Jacobson v. Massachusetts case. The case was the result of a Cambridge resident's refusal to be vaccinated. Henning Jacobsen, a Swedish immigrant, refused vaccination out of fear it would cause him illness. He claimed a previous smallpox vaccine had made him sick as a child. Rather than pay the five dollar fine, he challenged the state's authority on forcing people to receive vaccination. His case was lost at the state level, but Jacobson appealed the ruling, and so, the case was taken up by the Supreme Court. In 1905 the Supreme Court upheld the Massachusetts law: it was ruled Jacobson could not refuse the mandatory vaccination.
In Canada, between 1702 and 1703, nearly a quarter of the population of Quebec city died due to a smallpox epidemic.
Island South East Asia
There is evidence that smallpox reached the Philippine islands from the 4th century onwards – linked possibly to contact between South East Asians and Indian traders.
During the 18th century, there were many major outbreaks of smallpox, driven possibly by increasing contact with European colonists and traders. There were epidemics, for instance, in the Sultanate of Banjar (South Kalimantan), in 1734, 1750–51, 1764–65 and 1778–79; in the Sultanate of Tidore (Moluccas ) during the 1720s, and in southern Sumatra during the 1750s, the 1770s and in 1786.
Smallpox was externally brought to Australia. The first recorded outbreak, in April 1789, about 16 months after the arrival of the First Fleet, devastated the Aboriginal population. Governor Phillip said that about half of the people living around Sydney Cove died during the outbreak, while later estimates have been higher. There is an ongoing debate as part of the "History wars" concerning two main rival theories about how the disease first entered the continent. (Another hypothesis suggested that the French brought it in 1788, but the timeline does not fit.) The central hypotheses of these theories suggest that smallpox was transmitted to Indigenous Australians by either:
- the First Fleet of British settlers to arrive in the Colony of New South Wales, who arrived in January 1788 (whether deliberately or accidentally); or
- Makassan mariners visiting northern Australia.
In 1914, Dr J. H. L. Cumpston, director of the Australian Quarantine Service tentatively put forward the hypothesis that smallpox arrived with British settlers. Cumpston's theory was most forcefully reiterated by the economic historian Noel Butlin, in his book Our Original Aggression (1983). Likewise David Day, in Claiming a Continent: A New History of Australia (2001), suggested that members of Sydney's garrison of Royal Marines may have attempted to use smallpox as a biological weapon in 1789. However, in 2002, historian John Connor stated that Day's theory was "unsustainable". That same year, theories that smallpox was introduced with settlers, deliberately or otherwise, were contested in a full-length book by historian Judy Campbell: Invisible Invaders: Smallpox and Other Diseases in Aboriginal Australia 1780-1880 (2002). Campbell consulted, during the writing of her book, Frank Fenner, who had overseen the final stages of a successful campaign by the World Health Organization (WHO) to eradicate smallpox. Campbell argued that scientific evidence concerning the viability of variolous matter (used for inoculation) did not support the possibility of the disease being brought to Australia on the long voyage from Europe. Campbell also noted that there was no evidence of Aboriginal people ever having been exposed to the variolous matter, merely speculation that they may have been. Later authors, such as Christopher Warren, and Craig Mear  continued to argue that smallpox emanated from the importation of variolous matter on the First Fleet. Warren (2007) suggested that Campbell had erred in assuming that high temperatures would have sterilised the British supply of smallpox. H. A. Willis (2010), in a survey of the literature discussed above, endorsed Campbell's argument. In response, Warren (2011) suggested that Willis had not taken into account research on how heat affects the smallpox virus, cited by the WHO. Willis (2011) replied that his position was supported by a closer reading of Frank Fenner’s report to the WHO (1988) and invited readers to consult that report online.
The rival hypothesis, that the 1789 outbreak was introduced to Australia by visitors from Makassar, came to prominence in 2002, with Judy Campbell's book Invisible Invaders. Campbell expanded upon the opinion of C. C. Macknight (1986), an authority on the interaction between indigenous Australians and Makassans. Citing the scientific opinion of Fenner (who wrote the foreword to her book) and historical documents, Campbell argued that the 1789 outbreak was introduced to Australia by Makassans, from where it spread overland. Nevertheless, Michael Bennett in a 2009 article in Bulletin of the History of Medicine, argued that imported "variolous matter" may have been the source of the 1789 epidemic in Australia. In 2011, Macknight re-entered the debate, declaring: "The overwhelming probability must be that it [smallpox] was introduced, like the later epidemics, by [Makassan] trepangers on the north coast and spread across the continent to arrive in Sydney quite independently of the new settlement there". Warren (2013) disputed this, on the grounds that: there was no suitable smallpox in Makassar before 1789; there were no trade routes suitable for transmission to Port Jackson; the theory of a Makassan source for smallpox in 1789 was contradicted by Aboriginal oral tradition; and, the earliest point at which there was evidence of smallpox entering Australia with Makassan visitors was around 1824. Public health expert Mark Wenitong, a Kabi Kabi man, and John Maynard, Emeritus professor of Aboriginal History at the University of Newcastle agree that this is highly unlikely, with the added obstacle of very low population density between the north coast and Sydney Cove.
John Carmody, then at the University of Sydney School of Medical Sciences, suggested that the epidemic was more likely to have been chickenpox, as none of the European colonists were threatened by it, as he would have expected to happen. However Wenitong and Maynard continue to believe that there is strong evidence that it was smallpox.
Another major outbreak was observed in 1828–30, near Bathurst, New South Wales. A third epidemic occurred in the Northern Territory and northern Western Australia from the mid-1860s, until at least 1870.
Elsewhere in the Pacific, smallpox killed many indigenous Polynesians. Nevertheless, Alfred Crosby, in his major work, Ecological Imperialism: The Biological Expansion of Europe, 900-1900 (1986) showed that in 1840 a ship with smallpox on it was successfully quarantined, preventing an epidemic amongst Māori of New Zealand. The only major outbreak in New Zealand was a 1913 epidemic, which affected Māori in northern New Zealand and nearly wiped out the Rapa Nui of Easter Island (Rapa Nui), was reported by Te Rangi Hiroa (Dr Peter Buck) to a medical congress in Melbourne in 1914.
The whaler ship Delta brought smallpox to the Micronesian island of Pohnpei on 28 February 1854. The Pohnpeians reacted by first feasting their offended spirits and then resorted hiding. The disease eventually wiped out more than half the island's population. The deaths of chiefs threw Pohnpeian society into disarray, and the people started blaming the God of the Christian missionaries. The Christian missionaries themselves saw the epidemic as God's punishment for the people and offered the natives inoculations, though often withheld such treatment from the priests. The epidemic abated in October 1854.
AD 1588 emergence
This section needs expansion with: additional details & information. You can help by adding to it. (May 2021)
Early in history, it was observed that those who had contracted smallpox once were never struck by the disease again. Thought to have been discovered by accident, it became known that those who contracted smallpox through a break in the skin in which smallpox matter was inserted received a less severe reaction than those who contracted it naturally. This realization led to the practice of purposely infecting people with matter from smallpox scabs in order to protect them later from a more severe reaction. This practice, known today as variolation, was first practiced in China in the 10th century. Methods of carrying out the procedure varied depending upon location. Variolation was the sole method of protection against smallpox other than quarantine until Jenner's discovery of the inoculating abilities of cowpox against the smallpox virus in 1796. Efforts to protect populations against smallpox by way of vaccination followed for centuries after Jenner's discovery. Smallpox has since been completely eradicated since 1979, because of the mass vaccination efforts of the World Health Organization.
The word variolation is synonymous with inoculation, insertion, en-grafting, or transplantation. The term is used to define insertion of smallpox matter, and distinguishes this procedure from vaccination, where cowpox matter was used to obtain a much milder reaction among patients.
The practice of variolation (also known as inoculation) first came out of East Asia. First writings documenting variolation in China appear around 1500. Scabs from smallpox victims who had the disease in its mild form would be selected, and the powder was kept close to body temperature by means of keeping it close to the chest, killing the majority of the virus and resulting in a more mild case of smallpox. Scabs were generally used when a month old, but could be used more quickly in hot weather (15–20 days), and slower in winter (50 days). The process was carried out by taking eight smallpox scabs and crushing them in a mortar with two grains of Uvularia grandiflora in a mortar. The powder was administered nasally through a silver tube that was curved at its point, through the right nostril for boys and the left nostril for girls. A week after the procedure, those variolated would start to produce symptoms of smallpox, and recovery was guaranteed. In India, where the European colonizers came across variolation in the 17th century, a large, sharp needle was dipped into the pus collected from mature smallpox sores. Several punctures with this needle were made either below the deltoid muscle or in the forehead, and then were covered with a paste made from boiled rice. Variolation spread farther from India to other countries in south west Asia, and then to the Balkans.
In 1713, Lady Mary Wortley Montagu's brother died of smallpox; she too contracted the virus two years later at the age of twenty-six, leaving her badly scarred. When her husband was made ambassador to Ottoman Empire, she accompanied him to Constantinople. It was here that Lady Mary first came upon variolation. Two Greek women made it their business to engraft people with pox that left them un-scarred and unable to catch the pox again. In a letter, she wrote that she intended to have her own son undergo the process and would try to bring variolation into fashion in England. Her son underwent the procedure, which was performed by Charles Maitland, and survived with no ill effects. When an epidemic broke out in London following her return, Lady Mary wanted to protect her daughter from the virus by having her variolated as well. Maitland performed the procedure, which was a success. The story made it to the newspapers and was a topic for discussion in London salons. Princess Caroline of Wales wanted her children variolated as well but first wanted more validation of the operation. She had both an orphanage and several convicts variolated before she was convinced. When the operation, performed by the King's surgeon, Claudius Amyand, and overseen by Maitland, was a success, variolation got the royal seal of approval and the practice became widespread. When the practice of variolation set off local epidemics and caused death in two cases, public reaction was severe. Minister Edmund Massey, in 1772, called variolation dangerous and sinful, saying that people should handle the disease as the biblical figure Job did with his own tribulations, without interfering with God's test for mankind. Lady Mary still worked at promoting variolation but its practice waned until 1743.
Robert and Daniel Sutton further revived the practice of variolation in England by advertising their perfect variolation record, maintained by selecting patients who were healthy when variolated and were cared for during the procedure in the Sutton's own hygienic hospital. Other changes that the Suttons made to carrying out the variolation process include reducing and later abolishing the preparatory period before variolation was carried out, making more shallow incisions to distribute the smallpox matter, using smallpox matter collected on the fourth day of the disease, where the pus taken was still clear, and recommending that those inoculated get fresh air during recovery. The introduction of the shallower incision reduced both complications associated with the procedure and the severity of the reaction. The prescription of fresh air caused controversy about Sutton's method and how effective it was in reality when those inoculated could walk about and spread the disease to those that had never before experienced smallpox. It was the Suttons who introduced the idea of mass variolation of an area when an epidemic broke out as means of protection to the inhabitants in that location.
News of variolation spread to the royal families of Europe. Several royal families had themselves variolated by English physicians claiming to be specialists. Recipients include the family of Louis XV following his own death of smallpox, and Catherine the Great, whose husband had been horribly disfigured by the disease. Catherine the Great was variolated by Thomas Dimsdale, who followed Sutton's method of inoculation. In France, the practice was sanctioned until an epidemic was traced back to an inoculation. After this instance, variolation was banned within city limits. These conditions caused physicians to move just outside the cities and continue to practice variolation in the suburbs.
Edward Jenner was variolated in 1756 at age eight in an inoculation barn in Wotton-under-Edge, England. At this time, in preparation for variolation children were bled repeatedly and were given very little to eat and only given a diet drink made to sweeten their blood. This greatly weakened the children before the actual procedure was given. Jenner's own inoculation was administered by a Mr. Holbrow, an apothecary. The procedure involved scratching the arm with the tip of a knife, placing several smallpox scabs in the cuts and then bandaging the arm. After receiving the procedure, the children stayed in the barn for several weeks to recover. First symptoms occurred after one week and usually cleared up three days later. On average, it took a month to fully recover from the encounter with smallpox combined with weakness from the preceding starvation.
At the age of thirteen, Jenner was sent to study medicine in Chipping Sodbury with Daniel Ludlow, a surgeon and apothecary, from 1762 to 1770 who had a strong sense of cleanliness which Jenner learned from him. During his apprenticeship, Jenner heard that upon contracting cowpox, the recipient became immune to smallpox for the remainder of their life. However, this theory was dismissed because of several cases proving that the opposite was true.
After learning all he could from Ludlow, Jenner apprenticed with John Hunter in London from 1770 to 1773. Hunter was a correspondent of Ludlow’s, and it is likely that Ludlow recommended Jenner to apprentice with Hunter. Hunter believed in deviating from the accepted treatment and trying new methods if the traditional methods failed. This was considered unconventional medicine for the time period and had a pivotal role in Jenner's development as a scientist.
After two years of apprenticeship, Jenner moved back to his hometown of Berkeley in Gloucestershire, where he quickly gained the respect of both his patients and other medical professionals for his work as a physician. It was during this time that Jenner revisited the connection between cowpox and smallpox. He began investigating dairy farms in the Gloucestershire area looking for cowpox. This research was slow going as Jenner often had to wait months or even years before cases of cowpox would again return to the Gloucestershire area. During his study, he found that cowpox was actually several diseases that were similar in nature but were distinguishable through slight differences, and that not all versions had the capacity to make one immune from smallpox upon contraction.
Through his study, he incorrectly deduced that smallpox and cowpox were all the same disease, simply manifesting themselves differently in different animals, eventually setting back his research and making it difficult to publish his findings. Though Jenner had seen cases of people becoming immune to smallpox after having cowpox, too many exceptions of people still contracting smallpox after having had cowpox were arising. Jenner was missing crucial information which he later discovered in 1796. Jenner hypothesized that in order to become immune to smallpox using cowpox, the matter from the cowpox pustules must be administered at maximum potency; else it was too weak to be effective in creating immunity to smallpox. He deduced that cowpox was most likely to transfer immunity from smallpox if administered at the eighth day of the disease.
On May 14, 1796, he performed an experiment in which he took pus from a sore of a cowpox-infected milkmaid named Sarah Nelmes, and applied it to a few small scratches on the arm of an eight-year-old boy who had never before contracted either smallpox or cowpox, named James Phipps. Phipps recovered as expected. Two months later, Jenner repeated the procedure using matter from smallpox, observing no effect. Phipps became the first person to become immune to smallpox without ever actually having the disease. He was variolated many more times over the course of his life to prove his immunity.
When the next cowpox epidemic broke out in 1798, Jenner conducted a series of inoculations using cowpox, all of them successful including on his own son Robert. Because his findings were revolutionary and lacked in evidence, the Royal Society (of which Jenner was a member) refused to publish his findings. Jenner then rode to London and had his book An Inquiry into the Causes and Effects of the Variolæ Vaccinæ published by Sampson Low’s firm in June 1798. The book was an instant bestseller among the elite in London salons, in the medical establishment and among the ladies and gentlemen of the enlightenment.
Knowledge of the ability of cowpox to provide immunity from smallpox was present in England before Jenner's discovery. In 1774, a cattle dealer named Benjamin Jesty had successfully inoculated his wife and three sons using cowpox. This was before Jenner discovered the immunization capabilities of cowpox. However, Jesty simply performed the procedure; he did not take the discovery any further by inoculating his family with smallpox matter to see if there would be a reaction or perform any other trials. Jenner was the first to prove the effectiveness of vaccination with cowpox using scientific experimentation.
Benjamin Franklin, who had lost his own son to smallpox in 1736, made the suggestion to create a pamphlet to distribute to families explaining how to inoculate their children themselves, so as to eliminate cost as the factor in the decision to choose to inoculate children. William Heberden, a friend of Franklin's and an English physician, followed through with Franklin's idea, printing 2000 pamphlets in 1759 which were distributed by Franklin in America.
An American physician, John Kirkpatrick, upon his visit to London in 1743, told of an instance where variolation stopped an epidemic in Charleston, South Carolina, in 1738, where 800 people were inoculated and only eight deaths occurred. His account of the success of variolation in Charleston helped to play a role in the revival of its practice in London. Kirkpatrick also advocated inoculating patients with matter from the sores of another inoculated person, instead of using matter from the sore of a smallpox victim, a procedure that Maitland had been using since 1722.
- Barquet N, Domingo P; Domingo (1997). "Smallpox: the triumph over the most terrible of the minister of death". Annals of Internal Medicine. 127 (8 Pt 1): 635–42. CiteSeerX 10.1.1.695.883. doi:10.7326/0003-4819-127-8_Part_1-199710150-00010. PMID 9341063. S2CID 20357515.
- Fenner, F.; Henderson, D.A.; Arita, I.; Jezek, Z.; Ladnyi, I.D. (1988). Smallpox and Its Eradication (PDF). History of International Public Health, No. 6. Geneva: World Health Organization. ISBN 978-92-4-156110-5.
- Behbehani AM (1983). "The smallpox story: life and death of an old disease". Microbiol Rev. 47 (4): 455–509. doi:10.1128/MMBR.47.4.455-509.1983. PMC 281588. PMID 6319980.
- Riedel S (2005). "Edward Jenner and the history of smallpox and vaccination". Proc (Bayl Univ Med Cent). 18 (1): 21–5. doi:10.1080/08998280.2005.11928028. PMC 1200696. PMID 16200144.
- Koplow, David A. (2003). Smallpox: the fight to eradicate a global scourge. Berkeley: University of California Press. ISBN 978-0-520-24220-3.
- "UC Davis Magazine, Summer 2006: Epidemics on the Horizon". Archived from the original on 2008-12-11. Retrieved 2008-01-03.
- How Poxviruses Such As Smallpox Evade The Immune System, ScienceDaily, February 1, 2008
- "Smallpox". WHO Factsheet. Retrieved 2007-09-22.
- De Cock, Kevin M. (2001). "(Book Review) The Eradication of Smallpox: Edward Jenner and The First and Only Eradication of a Human Infectious Disease". Nature Medicine. 7 (1): 15–6. doi:10.1038/83283. S2CID 40431647.
- Tognotti E. (June 2010). "The eradication of smallpox, a success story for modern medicine and public health: What lessons for the future?" (PDF). J Infect Dev Ctries. 4 (5): 264–266. doi:10.3855/jidc.1204. PMID 20539058.
- "The world is free of rinderpest". The Mail and Guardian. 2011-05-25.
- Littman, R. J.; Littman, M. L. (1973). "Galen and the Antonine Plague". The American Journal of Philology. 94 (3): 243–255. doi:10.2307/293979. JSTOR 293979. PMID 11616517.
- Plague in the Ancient World. Loyno.edu. Retrieved on 2011-12-06.
- Past pandemics that ravaged Europe, BBC News, November 7, 2005
- Hopkins DR (2002). The Greatest Killer: Smallpox in history. University of Chicago Press. ISBN 978-0-226-35168-1. Originally published as Princes and Peasants: Smallpox in History (1983), ISBN 0-226-35177-7
- Nicholas R (1981). "The goddess Sitala and epidemic smallpox in Bengal, India". J Asian Stud. 41 (1): 21–45. doi:10.2307/2055600. JSTOR 2055600. PMID 11614704.
- "Sitala and Smallpox". The thermal qualities of substance: Hot and Cold in South Asia. Retrieved 2006-09-23.
- Vassar: Points out that variolation was regarded as a means of invoking the goddess whereas vaccination was opposition to her. Gives duration of belief until fifty years ago. Reli350.vassar.edu. Retrieved on 2011-12-06.
- Heather Whipps, "How Smallpox Changed the World', LiveScience, June 23, 2008
- Allbutt, Thomas Clifford (1897). A System Of Medicine. The Macmillan Company. pp. Vol 3, 183.
- Hays, J. N. (2005). Epidemics and Pandemics: Their Impacts on Human History. ABC-CLIO. pp. 151–152. ISBN 9781851096589.
- Horst R. Thieme (2003). "Mathematics in population biology". Princeton University Press. p.285. ISBN 0-691-09291-5
- Otri AM, Singh AD, Dua HS (2008). "Cover illustration. Abu Bakr Razi". Br J Ophthalmol. 92 (10): 1324. PMID 18815419.
- Smallpox and Vaccinia. Ncbi.nlm.nih.gov. Retrieved on 2011-12-06.
- Smallpox In Europe Selected For Genetic Mutation That Confers Resistance To HIV Infection. ScienceDaily. November 20, 2003
- Macintyre, Donald Meeting the First Inhabitants, TIME Asia. 21 August 2000
- The War Against Smallpox. Strategypage.com (2007-09-25). Retrieved on 2011-12-06.
- Rogers, L (1945). "Smallpox and Vaccination in British India During the Last Seventy Years". Proceedings of the Royal Society of Medicine. 38 (3): 135–40. doi:10.1177/003591574503800318. PMC 2181657. PMID 19993010.
- Robin ED, McCauley RF (Jan–Mar 1997). "Smallpox – some unknown heroes in smallpox eradication". Indian Journal of Medical Ethics. 5 (1). Archived from the original on 2008-11-20. Retrieved 2008-12-21.
- Fenner, Frank, Donald A. Henderson, Isao Arita, Zdenek Jezek, and Ivan Danilovich Ladnyi. Smallpox and its Eradication. Geneva: World Health Organization, 1988. WHO Library Database.
- Worldwide Epidemics 1999 Genealogy Inc
- Alonso de Góngora Marmolejo Historia de Chile desde su descubrimiento hasta el año 1575. Cervantesvirtual.com. Retrieved on 2011-12-06.
- Contreras Cruces, Hugo (2016). "Migraciones locales y asentamiento indígena en las estancias españolas de Chile central, 1580-1650". Historia (in Spanish). 49 (1): 87–110. doi:10.4067/S0717-71942016000100004.
- Barros Arana, Diego. Historia general de Chile (in Spanish). Tomo cuarto (Digital edition based on the second edition of 2000 ed.). Alicante: Biblioteca Virtual Miguel de Cervantes. pp. 360–361.
- Smallpox, The Canadian Encyclopedia
- Lange, Greg. (2003-01-23) Smallpox epidemic ravages Native Americans on the northwest coast of North America in the 1770s Archived 2008-06-10 at the Wayback Machine. Historyink.com. Retrieved on 2011-12-06.
- Boraas AS (1991). Peter Kalifornsky: A Biography. In: A Dena'ina Legacy — K'tl'egh'i Sukdu: The Collected Writings of Peter Kalifornsky (Kari J, Boraas AS, eds). Fairbanks, AK: Alaska Native Language Center, University of Alaska Fairbanks. p. 475.
- The Spirit of Pestilence: A Bibliography, SFU
- The Spirit of Pestilence: The Smallpox Epidemic in Victoria in 1862, SFU
- Smallpox Epidemic of 1862 among Northwest Coast and Puget Sound Indians, HistoryLink.org
- "The Victoria Smallpox Epidemic of 1862, Grant Keddie, BCHeritage.ca website". Archived from the original on 2015-01-13. Retrieved 2014-07-26.
- June 10, 1862 and the Seizure of British Columbia from its First Nations, Shawn Swanky, shawnswanky.com]
- Bengoa, José (2000). Historia del pueblo mapuche: Siglos XIX y XX (Seventh ed.). LOM Ediciones. p. 224. ISBN 978-956-282-232-9.
- Casanova Rojas, Felipe; Díaz Araya, Alberto; Castillo Ramírez, Daniel (2017). "Tras los pasos de la muerte. Mortandad en Tacna durante la Guerra del Pacífico, 1879-1880". Historia (in Spanish). 50 (II): 399–341.
- The Story Of... Smallpox. Pbs.org. Retrieved on 2011-12-06.
- Henderson DA; Inglesby TV; Bartlett JG; Ascher, MS; Eitzen, E; Jahrling, PB; Hauer, J; Layton, M; et al. (1999). "Smallpox as a biological weapon: medical and public health management. Working Group on Civilian Biodefense". JAMA. 281 (22): 2127–37. doi:10.1001/jama.281.22.2127. PMID 10367824.
- Worldviews: Contact and Change (Alberta grade 8 social studies textbook), page 233.
- Quoted in Tzvetan Todorov, The Conquest of America: The Question of the Other (1999:136).
- – The War Against Smallpox. Strategypage.com (2007-09-25). Retrieved on 2011-12-06.
- Caspar Henderson (2013-04-10). The Book of Barely Imagined Beings: A 21st Century Bestiary. University of Chicago Press. pp. 20–. ISBN 978-0-226-04470-5.
- Silent Killers of the New World. millersville.edu
- Cook, Noble David (2004). "Smallpox or Bartonellosis?": Comment on "Epidemics and Demographic Disaster in Colonial Latin America: A Reassessment" (PDF).
- Berrin, Katherine & Larco Museum. The Spirit of Ancient Peru:Treasures from the Museo Arqueológico Rafael Larco Herrera. New York: Thames and Hudson, 1997.
- Diego Barros Arana, Historia general de Chile, Tomo Segundo, pg. 51 note 87, pg. 231–232.
- Dutch Children's Disease Kills Thousands of Mohawks Archived 2007-12-17 at the Wayback Machine. Paulkeeslerbooks.com. Retrieved on 2011-12-06.
- Duffy, John (1951). "Smallpox and the Indians in the American Colonies". Bulletin of the History of Medicine. 25 (4): 324–341. PMID 14859018.
- Ballard C. Campbell, ed. American Disasters: 201 Calamities That Shook the Nation (2008) pp 21-22
- Ola Elizabeth Winslow, A destroying angel;: The conquest of smallpox in colonial Boston (1974)
- Fenn, Elizabeth A. Biological Warfare in Eighteenth-Century North America: Beyond Jeffery Amherst Archived 2015-04-03 at the Wayback Machine; The Journal of American History, Vol. 86, No. 4, March, 2000
- "BBC – History – Silent Weapon: Smallpox and Biological Warfare". Retrieved 2008-01-02.
- Elizabeth A. Fenn. "Biological Warfare in Eighteenth-Century North America: Beyond Jeffery Amherst," The Journal of American History, Vol. 86, No. 4 (Mar., 2000), pp. 1552–1580
- Ranlet, P (2000). "The British, the Indians, and smallpox: what actually happened at Fort Pitt in 1763?". Pennsylvania History. 67 (3): 427–441. PMID 17216901.
- Barras, V.; Greub, G. (June 2014). "History of biological warfare and bioterrorism". Clinical Microbiology and Infection. 20 (6): 497–502. doi:10.1111/1469-0691.12706. PMID 24894605.
- King, J. C. H. (2016). Blood and Land: The Story of Native North America. Penguin UK. p. 73. ISBN 9781846148088.
- Fenn EA (2001). Pox Americana: The Great Smallpox Epidemic of 1775–82 (1st ed.). Hill and Wang. ISBN 978-0-8090-7820-2.
- Crawford, Michael H.; The Origins of Native Americans: evidence from anthropological genetics; Cambridge University Press, 2001; pgs. 245–250
- Phillip M. White (June 2, 2011). American Indian Chronology: Chronologies of the American Mosaic. Greenwood Publishing Group. p. 44.
- "Groundhog day at the wolf wars". Retrieved 2007-06-18.
- Houston CS, Houston S (2000). "The first smallpox epidemic on the Canadian Plains: In the fur-traders' words". Can J Infect Dis. 11 (2): 112–5. doi:10.1155/2000/782978. PMC 2094753. PMID 18159275.
- Rich, E. E.; Johnson, A. M. (1952). "Cumberland House Journals and Inland Journals 1775–82". The Canadian Historical Review. London: The Hudson's Bay Record Society.
- Rich EE (1967). The Fur Trade and the Northwest to 1875 (11th ed.). McClelland and Stewart Limited.
- Paul Hackett (2002). A Very Remarkable Sickness. University of Manitoba Press. ISBN 978-0-88755-659-3.
- "First X, Then Y, Now Z : Landmark Thematic Maps - Medicine". Princeton University Library. 2012. Archived from the original on 2018-09-13. Retrieved 2018-05-22.
- Morman, Edward T. (2006). "Smallpox". In Finkelman, Paul (ed.). Encyclopedia of the New American Nation. Charles Scribner's Sons. pp. 207–208.
- Lewis Cass and the Politics of Disease: The Indian Vaccination Act of 1832. Muse.jhu.edu. Retrieved on 2011-12-06.(registration required)
- Willrich, Michael (2011). Pox: An American History. 1st ed. London, England: The Penguin Press p. 15-30
- Albert, Michael R.; Ostheimer, Kristen G.; Breman, Joel G. (February 1, 2001). "The Last Smallpox Epidemic in Boston and the Vaccination Controversy, 1901–1903". The New England Journal of Medicine. 344 (5): 375–379. doi:10.1056/NEJM200102013440511. PMID 11172172.
- Albert, Michael R.; Ostheimer, Kristen G.; Liewehr, David J.; Steinberg, Seth M.; Breman, Joel G. (December 17, 2002). "Smallpox Manifestations and Survival during the Boston Epidemic of 1901 to 1903". Annals of Internal Medicine. 137 (12): 993–1000. doi:10.7326/0003-4819-137-12-200212170-00013. PMID 12484715.
- Victor T. King, 1998, Environmental Challenges in South-East Asia, London/New York, Routledge, pp. 78–79.
- M. C. Ricklefs, 1993, A History of Modern Indonesia Since c. 1200, Basingstoke, Palgrave Macmillan, pp. 72, 85.
- Atsushi Ōta, 2006, Changes of Regime and Social Dynamics in West Java: Society, State and the Outer World of Banten, 1750-1830, Leiden, Brill, pp. 79, 109, 113.
- Thorpe, Nakari; Willis, Olivia; Smith, Carl (8 June 2021). "'Devil devil': The sickness that changed Australia". ABC (Australian Broadcasting Corporation). Retrieved 2 August 2021.
- Smallpox Through History. Archived from the original on 2009-10-31.
- Cumpston, JHL "The History of Small-Pox in Australia 1788–1908", Government Printer (1914) Melb.
- Butlin, N.G. (1983). Our original aggression: Aboriginal populations of southeastern Australia, 1788-1850. Sydney: G. Allen & Unwin. pp. 19–24, 138–39. ISBN 978-0868612232.
- HarperCollins, Sydney, 2001, p42f.
- John Connor, The Australian Frontier Wars, 1788-1838, UNSW Press, 2002, p29.
- Campbell, Judy; 2002, Invisible Invaders: Smallpox and Other Diseases in Aboriginal Australia 1780–1880, Carlton, Melbourne University Press, pp60–2, 80–1, 194–6, 201, 216–7
- Warren C. (2008). "Could First Fleet smallpox infect Aborigines? – A note". Aboriginal History. 31: 152–164.
- Mear C. "The origin of the smallpox in Sydney in 1789". Journal of the Royal Australian Historical Society. 94 (1): 1–22.
- Willis, H. A (September 2010). "Poxy history [Smallpox and Aboriginal history.]". Quadrant. 54 (9): 70–73. ISSN 0033-5002.
- Warren, C. (2011). "The 1789 Smallpox". Quadrant. 55 (4): 4. ISSN 0033-5002.
- Willis, H.A. (2011). "Bringing Smallpox with the First Fleet". Quadrant. 55 (7–8): 2. ISSN 0033-5002.
- Macknight, C. C. "Macassans and the Aboriginal past" in Archaeologia Oceania | publication-date=1986 | volume=21 | pages=69–75
- "Smallpox and Cowpox Under the Southern Cross: The Smallpox Epidemic of 1789", Vol. 83 pt. 1 (2009), pp37-62.
- Macknight, Campbell "The view from Marege’: Australian knowledge of Macassar and the impact of the trepang industry across two centuries " in Aboriginal History | publication-date=2011 | volume=35 | pages=121–143.
- Warren, Christopher (30 October 2013). "Smallpox at Sydney Cove – who, when, why?". Journal of Australian Studies. 38 (1): 68–86. doi:10.1080/14443058.2013.849750. S2CID 143644513.
- Carmody, John (19 Sep 2010). "Chicken pox or smallpox in the colony at Sydney Cove in April, 1789". ABC Radio National (Interview). Ockham's Razor. Interviewed by Robyn; Williams. Retrieved 2 August 2021.
- New Zealand Historical Perspective. canr.msu.edu
- How did Easter Island's ancient statues lead to the destruction of an entire ecosystem?, The Independent
- Hanlon, David (1988). Upon a Stone Altar: A History of the Island of Pohnpei to 1890. Honolulu, HI: University of Hawaii Press. pp. 109–111. ISBN 9780824811242.
- "Child Mummy Found With Oldest Known Smallpox Virus". 2016-12-08. Retrieved 2016-12-09.
- Duggan, Ana T.; Perdomo, Maria F.; Piombino-Mascali, Dario; Marciniak, Stephanie; Poinar, Debi; Emery, Matthew V.; Buchmann, Jan P.; Duchêne, Sebastian; Jankauskas, Rimantas; Humphreys, Margaret; Golding, G. Brian; Southon, John; Devault, Alison; Rouillard, Jean-Marie; Sahl, Jason W.; Dutour, Olivier; Hedman, Klaus; Sajantila, Antti; Smith, Geoffrey L.; Holmes, Edward C.; Poinar, Hendrik N. (2016). "17th Century Variola Virus Reveals the Recent History of Smallpox". Current Biology. 26 (24): 3407–3412. doi:10.1016/j.cub.2016.10.061. PMC 5196022. PMID 27939314.
- U.S. National Library of Medicine. "Variolation". Accessed October 29, 2012. www.nlm.nih.gov/exhibition/smallpox/sp_variolation.html
- Glynn, Ian and Jennifer Glynn. The Life and Death of Smallpox. New York: Cambridge University Press, 2004.
- Hopkins, Donald R. The Greatest Killer: Smallpox in History. Chicago: The University of Chicago Press, 2002.
- Case Christine L; Chung King Thom (1997). "Montagu and Jenner: The Campaign Against Smallpox". SIM News. 47 (2): 58–60.
- Shurkin, Joel N. (1979). The Invisible Fire: The Story of Mankind's Triumph Over the Ancient Scourge of Smallpox. Toronto: Longman Canada.
- Halsal, Paul. "Modern History Sourcebook: Lady Mary Wortley Montagu (1689–1762): Smallpox Vaccination in Turkey." Fordham University. Accessed October 29, 2012. www.fordham.edu/halsall/mod/montagu-smallpox.asp
- MacNalty Arthur S (1968). "The Prevention of Smallpox: From Edward Jenner to Monckton Copeman". Medical History. 12 (1): 1–18. doi:10.1017/s0025727300012722. PMC 1033768. PMID 4867646.
- Bailey Ian (1996). "Edward Jenner (1749–1823): Naturalist, Scientist, Country Doctor, Benefactor to Mankind". Journal of Medical Biography. 4 (2): 63–70. doi:10.1177/096777209600400201. PMID 11616266. S2CID 30318738.
- The UCLA Louise M. Darling Biomedical Library History and Special Collections Division. "Smallpox: an online exhibit". Accessed October 29, 2012. Unitproj.library.ucla.edu/biomed/his/smallpox/jenner.html
- Wells Lloyd Allan (1999). "Why Not Try the Experiment?" The Scientific Education of Edward Jenner". Proceedings of the American Philosophical Society. 41 (1): 108–110. PMID 11615678.
- Meynell Elinor (1995). "French Reactions to Jenner's Discovery of Smallpox Vaccination: The Primary Sources". Social History of Medicine. 8 (2): 285–303. doi:10.1093/shm/8.2.285. PMID 11639810.
- McCandless, Peter. Slavery, Disease, and Suffering in the Southern Lowcountry. New York: Cambridge University Press, 2011
- Clendening, Logan (1960). "Chapter XXVII. Smallpox". Source Book of Medical History. Dover. pp. 291–305. ISBN 9780486206219; reprint of 1942 book.CS1 maint: postscript (link)
- Otto, Simon; Cappel, Constance (2007). The smallpox genocide of the Odawa tribe at L'Arbre Croche, 1763: the history of a Native American people. Lewiston, NY: Edwin Mellen Press. ISBN 978-0-7734-5220-6.
- "Hugh Walker and North Carolina's 'Smallpox Currency' of 1779", R. Neil Fulghum. The Colonial Newsletter, a research journal of the American Numismatic Society, New York. December 2005, pp. 2895–2934.
- Rich, E. E.; Johnson, A. M. (1952). Cumberland House Journals and Inland Journals 1775–82. London: The Hudson’s Bay Record Society.
- Sheldon Watts (1997). Epidemics and History: Disease, Power and Imperialism. New Haven: Yale University Press. ISBN 978-0-300-07015-6.
|Wikisource has the text of the 1911 Encyclopædia Britannica article "Smallpox".|
- Inoculation for the Small-Pox defended—1750 article from Gentleman's Magazine
- "Why Blame Smallpox?: The Death of the Inca Huayna Capac and the Demographic Destruction of Tawantinsuyu (Ancient Peru)" Revisionist argument regarding smallpox in 16th-century Peru
- History of Smallpox in South Asia