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The COVID-19 portal

SARS-CoV-2 as seen by a cryo-electron tomography scan.

Coronavirus disease 2019 (COVID-19) is a contagious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The first known case was identified in Wuhan, China, in December 2019. The disease has since spread worldwide, leading to an ongoing pandemic.

Several COVID-19 vaccines have been approved and distributed in various countries, which have initiated mass vaccination campaigns. Other preventive measures include physical or social distancing, quarantining, ventilation of indoor spaces, covering coughs and sneezes, hand washing, and keeping unwashed hands away from the face. The use of face masks or coverings has been recommended in public settings to minimize the risk of transmissions. While work is underway to develop drugs that inhibit the virus, the primary treatment is symptomatic. Management involves the treatment of symptoms, supportive care, isolation, and experimental measures. (Full article...)

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About the virus

This colorized transmission electron microscope image shows SARS-CoV-2—also known as 2019-nCoV, the virus that causes COVID-19—isolated from a patient in the U.S.

SARS‑CoV‑2 belongs to the broad family of viruses known as coronaviruses. It is a positive-sense single-stranded RNA (+ssRNA) virus, with a single linear RNA segment. Coronaviruses infect humans, other mammals, including livestock and companion animals, and avian species. Human coronaviruses are capable of causing illnesses ranging from the common cold to more severe diseases such as Middle East respiratory syndrome (MERS, fatality rate ~34%). SARS-CoV-2 is the seventh known coronavirus to infect people, after 229E, NL63, OC43, HKU1, MERS-CoV, and the original SARS-CoV.

Like the SARS-related coronavirus implicated in the 2003 SARS outbreak, SARS‑CoV‑2 is a member of the subgenus Sarbecovirus (beta-CoV lineage B). Coronaviruses undergo frequent recombination. The mechanism of recombination in unsegmented RNA viruses such as SARS-CoV-2 is generally by copy-choice replication, in which gene material switches from one RNA template molecule to another during replication. SARS-CoV-2 RNA sequence is approximately 30,000 bases in length, relatively long for a coronavirus (which in turn carry the largest genomes among all RNA families) Its genome consists nearly entirely of protein-coding sequences, a trait shared with other coronaviruses. (Full article...)

About the symptoms and spread

Symptoms of coronavirus disease 2019 (COVID-19)

Symptoms of COVID-19 are variable, ranging from mild symptoms to severe illness. Common symptoms include headache, loss of smell and taste, nasal congestion and runny nose, cough, muscle pain, sore throat, fever, diarrhea, and breathing difficulties. People with the same infection may have different symptoms, and their symptoms may change over time. Three common clusters of symptoms have been identified: one respiratory symptom cluster with cough, sputum, shortness of breath, and fever; a musculoskeletal symptom cluster with muscle and joint pain, headache, and fatigue; a cluster of digestive symptoms with abdominal pain, vomiting, and diarrhea. In people without prior ear, nose, and throat disorders, loss of taste combined with loss of smell is associated with COVID-19.

As is common with infections, there is a delay between the moment a person first becomes infected and the appearance of the first symptoms. The median delay for COVID-19 is four to five days. Most symptomatic people experience symptoms within two to seven days after exposure, and almost all will experience at least one symptom within 12 days. (Full article...)

The disease is mainly transmitted via the respiratory route when people inhale droplets and small airborne particles (that form an aerosol) that infected people breath out as they breathe, talk, cough, sneeze, or sing. Infected people are more likely to transmit COVID-19 when they are physically close. However, infection can occur over longer distances, particularly indoors. 2). (Full article...)

Disease progress


Location Cases Deaths
World[a] 240,402,906 4,894,860
United States United States 44,916,423 724,153
European Union European Union[b] 38,856,221 782,975
India India 34,067,719 452,124
Brazil Brazil 21,638,726 603,152
United Kingdom United Kingdom 8,443,882 138,940
Russia Russia 7,837,101 218,362
Turkey Turkey 7,630,133 67,437
France France 7,185,744 118,173
Iran Iran 5,773,419 123,876
Argentina Argentina 5,272,151 115,663
Spain Spain 4,984,386 86,974
Colombia Colombia 4,980,233 126,830
Italy Italy 4,715,464 131,517
Germany Germany 4,375,253 94,622
Indonesia Indonesia 4,234,011 142,933
Mexico Mexico 3,755,063 284,321
Poland Poland 2,937,069 76,111
South Africa South Africa 2,916,179 88,587
Ukraine Ukraine 2,745,165 64,367
Philippines Philippines 2,713,509 40,580
Malaysia Malaysia 2,384,542 27,858
Peru Peru 2,187,368 199,775
Netherlands Netherlands 2,083,444 18,674
Iraq Iraq 2,033,737 22,738
Thailand Thailand 1,772,838 18,205
Japan Japan 1,715,059 18,099
Czech Republic Czechia 1,707,756 30,539
Canada Canada 1,686,625 28,534
Chile Chile 1,669,236 37,597
Bangladesh Bangladesh 1,565,174 27,752
Romania Romania 1,445,714 41,482
Israel Israel 1,315,317 7,983
Belgium Belgium 1,279,869 25,747
Pakistan Pakistan 1,264,384 28,269
Sweden Sweden 1,161,933 14,956
Portugal Portugal 1,079,341 18,088
Serbia Serbia 1,043,758 9,052
Kazakhstan Kazakhstan 994,464 16,618
Morocco Morocco 941,863 14,537
Cuba Cuba 932,768 8,037
Vietnam Vietnam 860,860 21,131
Switzerland Switzerland 854,591 11,157
Jordan Jordan 840,117 10,865
Hungary Hungary 833,115 30,351
Nepal Nepal 804,652 11,278
Austria Austria 773,540 11,161
United Arab Emirates United Arab Emirates 738,487 2,118
Tunisia Tunisia 710,773 25,085
Greece Greece 692,197 15,348
Georgia (country) Georgia 657,753 9,440
Lebanon Lebanon 633,355 8,419
Guatemala Guatemala 587,687 14,266
Belarus Belarus 570,006 4,386
Costa Rica Costa Rica 551,144 6,797
Saudi Arabia Saudi Arabia 547,890 8,760
Bulgaria Bulgaria 539,619 22,231
Sri Lanka Sri Lanka 531,070 13,472
Ecuador Ecuador 513,026 32,899
Bolivia Bolivia 506,150 18,824
Azerbaijan Azerbaijan 498,630 6,734
Myanmar Myanmar 486,851 18,329
Panama Panama 469,998 7,288
Paraguay Paraguay 460,322 16,209
State of Palestine Palestine 447,032 4,556
Slovakia Slovakia 433,709 12,816
Croatia Croatia 426,613 8,877
Republic of Ireland Republic of Ireland 413,734 5,306
Kuwait Kuwait 412,297 2,456
Uruguay Uruguay 390,915 6,067
Venezuela Venezuela 390,045 4,693
Honduras Honduras 372,179 10,096
Denmark Denmark 370,046 2,682
Dominican Republic Dominican Republic 369,700 4,084
Lithuania Lithuania 366,481 5,406
Ethiopia Ethiopia 358,739 6,197
Libya Libya 349,210 4,860
South Korea South Korea 342,396 2,660
Mongolia Mongolia 336,508 1,527
Egypt Egypt 317,585 17,926
Moldova Moldova 315,414 7,206
Slovenia Slovenia 307,503 4,635
Oman Oman 304,025 4,103
Armenia Armenia 280,294 5,754
Bahrain Bahrain 276,030 1,391
Kenya Kenya 251,959 5,215
Bosnia and Herzegovina Bosnia and Herzegovina 243,914 11,110
Qatar Qatar 237,867 608
Zambia Zambia 209,505 3,658
Nigeria Nigeria 209,173 2,804
Algeria Algeria 205,199 5,870
North Macedonia North Macedonia 196,762 6,922
Norway Norway 196,142 884
Latvia Latvia 183,239 2,881
Botswana Botswana 181,856 2,386
Uzbekistan Uzbekistan 180,566 1,285
Kyrgyzstan Kyrgyzstan 179,775 2,632
Albania Albania 177,536 2,810
Estonia Estonia 171,395 1,422
Kosovo Kosovo 160,530 2,973
Afghanistan Afghanistan 155,739 7,238
Mozambique Mozambique 151,097 1,925
Finland Finland 149,897 1,116
Singapore Singapore 145,120 224
Australia Australia 143,204 1,532
Montenegro Montenegro 137,401 2,020
Zimbabwe Zimbabwe 132,333 4,657
Ghana Ghana 129,258 1,165
Namibia Namibia 128,239 3,538
Uganda Uganda 125,094 3,182
Cyprus Cyprus 121,995 562
Cambodia Cambodia 116,407 2,634
El Salvador El Salvador 110,188 3,460
Rwanda Rwanda 99,128 1,313
Cameroon Cameroon 98,402 1,550
China China[c] 96,600 4,636
Jamaica Jamaica 87,232 2,103
Maldives Maldives 86,088 237
Luxembourg Luxembourg 79,720 839
Senegal Senegal 73,865 1,871
Angola Angola 62,789 1,662
Malawi Malawi 61,712 2,292
Ivory Coast Ivory Coast 60,982 674
Democratic Republic of the Congo Democratic Republic of the Congo 57,269 1,089
Trinidad and Tobago Trinidad and Tobago 53,887 1,593
Fiji Fiji 51,701 663
Eswatini Eswatini 46,361 1,233
Suriname Suriname 46,313 1,014
Madagascar Madagascar 43,616 960
Sudan Sudan 39,550 3,038
Syria Syria 38,705 2,391
Cape Verde Cabo Verde 38,035 347
Malta Malta 37,445 459
Mauritania Mauritania 36,645 788
Guyana Guyana 34,362 866
Gabon Gabon 33,442 213
Laos Laos 31,736 38
Guinea Guinea 30,572 385
Tanzania Tanzania 26,034 724
Togo Togo 25,865 238
Benin Benin 24,560 161
Papua New Guinea Papua New Guinea 24,041 266
Belize Belize 23,990 461
Haiti Haiti 22,933 657
Seychelles Seychelles 21,854 119
The Bahamas Bahamas 21,580 590
Lesotho Lesotho 21,524 655
Somalia Somalia 21,269 1,180
East Timor Timor-Leste 19,707 119
Burundi Burundi 19,555 38
Tajikistan Tajikistan 17,484 125
Mauritius Mauritius 16,621 129
Taiwan Taiwan 16,336 846
Nicaragua Nicaragua 15,737 206
Mali Mali 15,603 557
Republic of the Congo Republic of the Congo 15,514 222
Andorra Andorra 15,338 130
Burkina Faso Burkina Faso 14,686 203
Djibouti Djibouti 13,383 179
Equatorial Guinea Equatorial Guinea 12,840 156
Barbados Barbados 12,773 114
Iceland Iceland 12,455 33
Hong Kong Hong Kong 12,291 213
Saint Lucia Saint Lucia 12,206 236
South Sudan South Sudan 12,184 130
Central African Republic Central African Republic 11,469 100
Brunei Brunei 10,356 68
The Gambia Gambia 9,946 339
Yemen Yemen 9,512 1,802
Eritrea Eritrea 6,773 44
Sierra Leone Sierra Leone 6,396 121
Niger Niger 6,160 204
Guinea-Bissau Guinea-Bissau 6,129 141
Liberia Liberia 5,803 286
Grenada Grenada 5,734 192
San Marino San Marino 5,473 91
Chad Chad 5,067 174
New Zealand New Zealand 4,992 28
Saint Vincent and the Grenadines Saint Vincent and the Grenadines 4,418 47
Comoros Comoros 4,184 147
Dominica Dominica 4,153 28
Antigua and Barbuda Antigua and Barbuda 3,888 95
São Tomé and Príncipe Sao Tome and Principe 3,675 56
Liechtenstein Liechtenstein 3,584 60
Monaco Monaco 3,358 35
Bhutan Bhutan 2,617 3
Saint Kitts and Nevis Saint Kitts and Nevis 2,546 21
Vatican City Vatican City 27 0
Solomon Islands Solomon Islands 20
Palau Palau 8 0
Marshall Islands Marshall Islands 4
Vanuatu Vanuatu 4 1
Samoa Samoa 3
Kiribati Kiribati 2
Federated States of Micronesia Federated States of Micronesia 1 0
  1. ^ Countries which do not report data for a column are not included in that column's world total.
  2. ^ Data on member states of the European Union are individually listed, but are also summed here for convenience. They are not double-counted in world totals.
  3. ^ Does not include special administrative regions (Hong Kong and Macau) or Taiwan.

National responses

Due to the pandemic in Europe, many countries in the Schengen Area have restricted free movement and set up border controls. National reactions have included containment measures such as quarantines and curfews (known as stay-at-home orders, shelter-in-place orders, or lockdowns). The WHO's recommendation on curfews and lockdowns is that they should be short-term measures to reorganise, regroup, rebalance resources, and protect health workers who are exhausted. To achieve a balance between restrictions and normal life, the long-term responses to the pandemic should consist of strict personal hygiene, effective contact tracing, and isolating when ill.


Recent news

17 October 2021 – COVID-19 pandemic
COVID-19 pandemic in Asia
COVID-19 pandemic in Brunei
Brunei reports a record 504 new cases of COVID-19 in the past 24 hours, thereby bringing the nationwide total of confirmed cases to 10,860. (Borneo Bulletin)
COVID-19 pandemic in Saudi Arabia
Saudi Arabia eases its COVID-19-related restrictions, lifting mandatory social distancing requirements as well as a requirement to wear face masks outdoors. (Arabian Business)
COVID-19 pandemic in Russia

Did you know?

Data maps

Economic impact

The COVID-19 pandemic has had far-reaching economic consequences beyond the spread of the disease itself and efforts to quarantine it. As the SARS-CoV-2 virus has spread around the globe, concerns have shifted from supply-side manufacturing issues to decreased business in the services sector. The pandemic caused the 2nd largest global recession in history, with more than a third of the global population at the time being placed on lockdown.

Global stock markets fell on 24 February 2020 due to a significant rise in the number of COVID-19 cases outside mainland China. By 28 February 2020, stock markets worldwide realized their largest single-week declines since the financial crisis of 2007–2008. This culminated in the 2020 stock market crash. (Full article...)


An inverted triangle consisting of five colored horizontal levels, each containing one tee five hazard control methods: elimination, substitution, engineering controls, administrative controls, and personal protective equipment
The hierarchy of hazard controls contains methods for controlling exposures to hazards. Methods listed towards the top potentially more effective than those at the bottom at reducing the risk of illness or injury.[2]

Hazard controls for COVID-19 in workplaces are the application of occupational safety and health methodologies for hazard controls to the prevention of coronavirus disease 2019 (COVID-19). The proper hazard controls in the workplace depend on the worksite and job task, based on an occupational risk assessment of sources of exposure, disease severity in the community, and risk factors of individual workers who may be vulnerable to contracting COVID-19.

OSHA considers healthcare and mortuary workers exposed to known or suspected person with COVID-19 to be at high exposure risk, which increases to very high exposure risk if workers perform aerosol-generating procedures on, or collect or handle specimens from, known or suspected person with COVID-19. Hazard controls appropriate for these workers include engineering controls such as negative pressure ventilation rooms, and personal protective equipment appropriate to the job task. (Full article...)


COVID-19 misinformation refers to any kind of subject about the COVID-19 pandemic that has resulted in misinformation and conspiracy theories about the scale of the pandemic and the origin, prevention, diagnosis, and treatment of the disease. False information, including intentional disinformation, has been spread through social media, text messaging, and mass media. False information has been propagated by celebrities, politicians, and other prominent public figures. Multiple countries have passed laws against "fake news", and thousands of people have been arrested for spreading COVID-19 misinformation. The spread of COVID-19 misinformation by governments has also been significant. (Full article...)


COVID-19 testing involves analyzing samples to assess the current or past presence of SARS-CoV-2. The two main branches detect either the presence of the virus or of antibodies produced in response to infection. Molecular tests for viral presence through its molecular components are used to diagnose individual cases and to allow public health authorities to trace and contain outbreaks. Antibody tests (serology immunoassays) instead show whether someone once had the disease. They are less useful for diagnosing current infections because antibodies may not develop for weeks after infection. It is used to assess disease prevalence, which aids the estimation of the infection fatality rate. (Full article...)

Vaccine research

A COVID‑19 vaccine is a vaccine intended to provide acquired immunity against severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2), the virus that causes coronavirus disease 2019 (COVID‑19). Prior to the COVID‑19 pandemic, an established body of knowledge existed about the structure and function of coronaviruses causing diseases like severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS). This knowledge accelerated the development of various vaccine platforms during early 2020. The initial focus of SARS-CoV-2 vaccines was on preventing symptomatic, often severe illness. On 10 January 2020, the SARS-CoV-2 genetic sequence data was shared through GISAID, and by 19 March, the global pharmaceutical industry announced a major commitment to address COVID-19. The COVID‑19 vaccines are widely credited for their role in reducing the spread, severity, and death caused by COVID-19. (Full article...)

Drug research

COVID-19 drug development is the research process to develop preventative therapeutic prescription drugs that would alleviate the severity of coronavirus disease 2019 (COVID-19). From early 2020 through 2021, several hundred drug companies, biotechnology firms, university research groups, and health organizations were developing therapeutic candidates for COVID-19 disease in various stages of preclinical or clinical research (506 total candidates in April 2021), with 419 potential COVID-19 drugs in clinical trials, as of April 2021. (Full article...)



Related portals

Get involved!

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Get involved by joining WikiProject COVID-19. We discuss collaborations and all manner of issues on our talk page. As of 18 October 2021, there are 2,086 articles within the project's scope. A full list is available here.


Category puzzle

Select [►] to view subcategories


  1. ^ Ritchie, Hannah; Mathieu, Edouard; Rodés-Guirao, Lucas; Appel, Cameron; Giattino, Charlie; Ortiz-Ospina, Esteban; Hasell, Joe; Macdonald, Bobbie; Beltekian, Diana; Dattani, Saloni; Roser, Max (2020–2021). "Coronavirus Pandemic (COVID-19)". Our World in Data. Retrieved 2021-10-17.
  2. ^ "Hierarchy of Controls". U.S. National Institute of Occupational Safety and Health. Retrieved 2017-03-05.

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