Kivu Ebola epidemic

This article is about an Ebola virus outbreak in the Democratic Republic of the Congo and Uganda. For the prior Ebola outbreak in DRC, see 2018 Équateur province Ebola outbreak.

Kivu Ebola epidemic

Democratic Republic of the Congo & Uganda
Date	1 August 2018–25 June 2020
Casualties
Country Cases (conf./prob./susp.) Deaths Last update DRC 3,313 / 153 / 0 2,266 Uganda 4 / 0 / 0 4 Total 3,470 (see note 1) 2,280 As of 25 June 2020

The Kivu Ebola epidemic began on 1 August 2018, when four cases of Ebola virus disease (EVD) were confirmed in the eastern region of Kivu in the Democratic Republic of the Congo (DRC). The Kivu outbreak also affected Ituri Province, whose first case was confirmed on 13 August, and in June 2019, the virus reached Uganda, having infected a 5-year-old Congolese boy who entered Uganda with his family, but was contained. In November 2018, the outbreak became the biggest Ebola outbreak in the DRC's history, and by November, it had become the second-largest Ebola outbreak in recorded history, behind only the 2013–2016 Western Africa epidemic. On 3 May 2019, nine months into the outbreak, the DRC outbreak death toll surpassed 1,000.

Since January 2015, the affected province and general area have been experiencing a military conflict, which is hindering treatment and prevention efforts. The World Health Organization (WHO) has described the combination of military conflict and civilian distress as a potential "perfect storm" that could lead to a rapid worsening of the outbreak. In May 2019, the WHO reported that since January of that year there had been 42 attacks on health facilities and 85 health workers had been wounded or killed. In some areas, aid organizations have had to stop their work due to violence. Health workers also have to deal with misinformation spread by opposing politicians.

Due to the deteriorating security situation in North Kivu and surrounding areas, the WHO raised the risk assessment at the national and regional level from "high" to "very high" in September 2018. In October, the United Nations Security Council stressed that all armed hostility in the DRC should come to a stop to better fight the ongoing EVD outbreak. A confirmed case in Goma triggered the decision by the WHO to convene an emergency committee for the fourth time, and on 17 July 2019, the WHO announced a Public Health Emergency of International Concern (PHEIC), the highest level of alarm the WHO can sound.

On 15 September 2019, some slowdown of EVD cases was noted by the WHO in DRC. However, contact tracing continued to be less than 100%; at the time, it was at 89%. As of mid-October the transmission of the virus had significantly reduced; by then it was confined to the Mandima region near where the outbreak began, and was only affecting 27 health zones in the DRC (down from a peak of 207). Cases dwindled to zero by 17 February 2020, but after 52 days without a case, surveillance and response teams on the ground confirmed three new cases of Ebola in Beni health zone in mid-April. On 25 June 2020, the outbreak was declared ended.

As a new and separate outbreak, the Congolese health ministry reported on 1 June 2020 that there were cases of Ebola in Équateur Province in north-western DRC, described as the eleventh Ebola outbreak since records began. Five people died in Mbandaka during the second half of May. This outbreak had increased within the province to 50 cases and 20 deaths by 14 July.

Epidemiology

Note Above graph begins in Aug. 2018 at one month intervals, then progresses to two month intervals as the outbreak intensifies at beginning of 2019, then finally has a four month interval until it is declared over (due to a flare up just days prior to the first two 21 day period to call the outbreak over per WHO, which caused a restart of the coutdown)
*2018–19 Kivu Ebola epidemic (total cases-deaths as of 25 June 2020)
*^x indicates (2) 21 day periods have passed and outbreak is over

Democratic Republic of the Congo

Map of the Democratic Republic of the Congo; North Kivu (orange, middle) South Kivu (dark red, bottom) and Ituri (green, top)

On 1 August 2018, the North Kivu health division notified Congo's health ministry of 26 cases of hemorrhagic fever, including 20 deaths. Four of the six samples that were sent for analysis to the National Institute of Biological Research in Kinshasa came back positive for Ebola and an outbreak was declared on that date. The index case is believed to have been the death and unsafe burial of a 65-year-old woman on 25 July in the town of Mangina; soon afterwards seven members of her immediate family died. This outbreak started just days after the end of the outbreak in Équateur province.

By 3 August, the virus had developed in multiple locations; cases were reported in five health zones – Beni, Butembo, Oicha, Musienene and Mabalako – in North Kivu province as well as Mandima and Mambasa in Ituri Province. However, one month later there had been confirmed cases only in the Mabalako, Mandima, Beni and Oicha health zones. The five suspected cases in the Mambasa Health Zone proved not to be EVD; it was not possible to confirm the one probable case in the Musienene Health Zone and the two probable cases in the Butembo Health Zone. No new cases had been recorded in any of those health zones. The first confirmed case in Butembo was announced on 4 September, the same day that it was announced that one of the cases registered at Beni had actually come from the Kalunguta Health Zone.

On 1 August, just after the Ebola epidemic had been declared, Doctors Without Borders/Médecins Sans Frontières (MSF) arrived in Mangina, the point of origin of the outbreak, to mount a response. On 2 August, Oxfam indicated it would be taking part in the response to this latest outbreak in the DRC. On 4 August, the WHO indicated that the current situation in the DRC, due to several factors, warranted a "high risk assessment" at the national and regional level for public health.

In November, it was reported that the EVD outbreak ran across two provinces (and 14 health zones). Table 1. Timeline of reported cases reflects cases that were not able to have a laboratory test sample prior to burial as probable cases. By 23 December, the EVD outbreak had spread to more health zones, and at that time 18 such areas had been affected.

Becoming the 2nd biggest EVD outbreak

On 7 August 2018, the DRC Ministry of Public Health indicated that the total count had climbed to almost 90 cases, and the Uganda Ministry of Health issued an alert for extra surveillance as the outbreak was just 100 kilometres (62 mi) away from its border. Two days later the total count was nearly 100 cases. On 16 August, the United Kingdom indicated it would help with EVD diagnosis and monitoring in the DRC. On 17 August 2018, the WHO reported that there were around 1,500 "contacts", while noting that certain conflict zones in the DRC that could not be reached might have contained more contacts. Some 954 contacts were successfully followed up on 18 August; however, Mandima Health Zone indicated resistance, so contacts were not followed up there.

On 4 September, Butembo, a city with almost one million people and an international airport, recorded its first fatality in the Ebola outbreak. The city of Butembo, in the DRC, has trade links to nearby Uganda.

On 24 September, it was reported that all contact tracing and vaccinations would stop for the foreseeable future in Beni due to a deadly attack by rebel groups the day before. On 25 September, Peter Salama of the WHO indicated that insecurity was obstructing efforts to stop the virus and believed a combination of factors could establish conditions for an epidemic. On 18 October, the U.S. Centers for Disease Control and Prevention (CDC) raised its travelers' alert to the DRC from a level 1 to level 2 for all U.S. travelers. On 26 October, the WHO indicated that half of confirmed cases were not showing any fever symptom, thus making diagnosis more difficult.

According to a September 2018 Lancet survey, 25% of respondents in Beni and Butembo believed the Ebola outbreak to be a hoax. These beliefs correlated with decreased likelihood of seeking healthcare or accepting vaccination.

On 6 November 2018, the CDC indicated that the current outbreak in the east region of the DRC was potentially non-containable. This would be the first time since 1976 that an outbreak was not able to be curbed. On 13 November, the WHO indicated that the viral outbreak would last at least six months.

On 29 December 2018, the DRC Ministry of Public Health announced that there had been "0 new confirmed cases detected because of the paralysis of the activities of the response in Beni, Butembo, Komanda and Mabalako" and no vaccination had occurred for three consecutive days. On 22 January, the total case count began to approach 1,000 cases, (951 suspected) in the DRC Ministry of Public Health situation report. The graphs below demonstrate the EVD intensity in different locations in the DRC, as well as in the West African epidemic of 2014–15 as a comparison:

• 
  New cases per week in Mabalako between 2018-07-16 and 2018-12-31
• 
  New cases per week in town Beni between 2018-07-23 and 2019-01-28
• 
  New cases per week in Butembo (brown) and Katwa (yellow) between 2018-07-23 and 2019-02-04
• 
  West Africa Ebola epidemic cases per week, for comparison with current outbreak

On 16 March 2019, the director of the CDC indicated that the outbreak in the DRC could last another year, additionally suggesting that vaccine supplies could run out. According to the WHO, resistance to vaccination in the Kaniyi Health Zone was ongoing as of March 2019. There was still a belief by some in surrounding areas that the epidemic was a hoax.

On 25 November 2019, it was reported that violence had broken out in Beni again, to such a degree that some aid agencies had evacuated. According to the same report, around 300 individuals might have been exposed to EVD via an infected individual.

Spread to Goma

On 14 July 2019, the first case of EVD was confirmed in the capital of North Kivu, Goma, a city with an international airport and a highly mobile population of 2 million people located near the DRC's eastern border with Rwanda. This case was a man who had passed through three health checkpoints, with different names on traveller lists. The WHO stated that he died in a treatment centre, whereas according to Reuters he died en route to a treatment centre. This case triggered the decision by the WHO to again reconvene an emergency committee, where the situation was officially declared a Public Health Emergency of International Concern.

On 30 July, a second case of EVD was confirmed in the city of Goma, apparently not linked to the first case. Across the border from Goma in the country of Rwanda, Ebola simulation drills were being conducted at health facilities. A third case of EVD was confirmed in Goma on 1 August. On 22 August 2019, Nyiragongo Health Zone, the affected area on the outskirts of Goma, reached 21 days without further cases being confirmed.

Spread to South Kivu Province

On 16 August 2019, it was reported that the Ebola virus disease had spread to a third province – South Kivu – via two new cases who had travelled from Beni, North Kivu. By August 22, the number of cases in Mwenga had risen to four, including one person at a health facility visited by the first case.

Uganda

Further information: Refugees of Uganda

Map of Uganda; District Kasese in Western Region

In August 2018 a UN agency indicated that active screening was deployed to ensure that those leaving the DRC into Uganda were not infected with Ebola. The government of Uganda opened two Ebola treatment centers at the border with the DRC, though there had not yet been any confirmed cases in the country of Uganda. By 13 June 2019, nine treatment units were in place near the affected border.

According to the International Red Cross, a "most likely scenario" entailed an asymptomatic case entering the country of Uganda undetected among the numerous refugees then coming from the DRC. On 20 September, Uganda indicated it was ready for immediate vaccination, should the Ebola virus be detected in any individual.

On 21 September, officials of the DRC indicated a confirmed case of EVD at Lake Albert, an entry point into Uganda, though no cases were then confirmed within Ugandan territory.

On 2 November, it was reported that the Ugandan government would start vaccinating health workers along the border with the DRC as a proactive measure against the virus. Vaccinations started on 7 November, and by 13 June 2019, 4,699 health workers at 165 sites had been vaccinated. Proactive vaccination was also carried out in South Sudan, with 1,471 health workers vaccinated by 7 May 2019.

On 2 January 2019, it was reported that refugee movement from the DRC to Uganda had increased after the presidential elections. On 12 February, it was reported that 13 individuals had been isolated due to their contact with a suspected Ebola case in Uganda; lab results came back negative several hours later.

On 11 June 2019, the WHO reported that the virus had spread to Uganda. A 5-year-old Congolese boy entered Uganda on the previous Sunday with his family to seek medical care. On 12 June, the WHO reported that the 5-year-old patient had died, while 2 more cases of Ebola infection within the same family were also confirmed. On 14 June it was reported that there were 112 contacts since EVD was first detected in Uganda. Ring vaccination of Ugandan contacts was scheduled to start on 15 June. As of 18 June 2019, 275 contacts had been vaccinated per the Uganda Ministry of Health.

On 14 July, an individual entered the country of Uganda from DRC while symptomatic for EVD; a search for contacts in Mpondwe followed. On 24 July, Uganda marked the needed 42 day period without any EVD cases to be declared Ebola-free. On 29 August, a 9-year-old Congolese girl became the fourth individual in Uganda to test positive for EVD when she crossed from the DRC into the district of Kasese.

Tanzania

Map of United Republic of Tanzania

In regards to possible EVD cases in Tanzania, the WHO stated on 21 September 2019 that "to date, the clinical details and the results of the investigation, including laboratory tests performed for differential diagnosis of these patients, have not been shared with WHO. The insufficient information received by WHO does not allow for a formulation of a hypotheses regarding the possible cause of the illness". On 27 September, the CDC and U.S. State Department alerted potential travellers to the possibility of unreported EVD cases within Tanzania.

The Tanzanian Health Minister Ummy Mwalimu stated on 3 October 2019 that there was no Ebola outbreak in Tanzania. The WHO were provided with a preparedness update on 18 October which outlined a range of actions, and included commentary that since the outbreak commenced, there had been "29 alerts of Ebola suspect cases reported, 17 samples tested and were negative for Ebola (including 2 in September 2019)".

Countries with medically evacuated individuals

On 29 December, an American physician who was exposed to the Ebola virus (and who was non-symptomatic) was evacuated, and taken to the University of Nebraska Medical Center. On 12 January, the individual was released after 21 days without symptoms.

'Table 1.' Timeline of reported cases
Date	Cases #				Deaths	CFR	Contacts	Sources
	Confirmed	Probable	Suspected	Totals
2018-08-01†DRC	4	22	0	26	20	-	-
2018-08-03	13	30	33	76	33	76.7%‡	879
2018-08-05	16	27	31	74	34	79%‡	966
2018-08-10	25	27	48	100	39	75%‡	953
2018-08-12	30	27	58	115	41	-	997
2018-08-17	64	27	12	103	50	55.6%‡	1,609
2018-08-20	75	27	9	111	59	-	2,408
2018-08-24	83	28	6	117	72	65%‡	3,421
2018-08-26	83	28	10	121	75	67.6%‡	2,445
2018-08-31	90	30	8	128	78	65%‡	2,462
2018-09-02	91	31	9	131	82	-	2,512
2018-09-07	100	31	14	145	89	68%‡	2,426
2018-09-09	101	31	9	141	91	-	2,265
2018-09-14	106	31	17	154	92	67.2%‡	1,751
2018-09-16	111	31	7	149	97	-	2,173
2018-09-21	116	31	n/a	147	99	67.3%‡	1,641
2018-09-23	119	31	9	159	100	67%‡	1,836
2018-09-28	126	31	23	180	102	65%‡	1,410
2018-10-02	130	32	17	179	106	65.4%‡	1,463
2018-10-05	142	35	11	188	113	63.8%‡	2,045
2018-10-07	146	35	21	202	115	63.5%‡	2,115
2018-10-12	176	35	32	243	135	64%‡	2,663
2018-10-15	181	35	32	248	139	64%‡	4,707
2018-10-19	202	35	33	270	153	65%‡	5,518
2018-10-21	203	35	14	252	155	65%‡	5,341
2018-10-26	232	35	43	310	170	64%‡	6,026
2018-10-28	239	35	32	306	174	63.5%‡	5,991
2018-11-02	263	35	70	368	186	62.4%‡	5,036
2018-11-04	265	35	61	361	186	62%‡	4,971
2018-11-09	294	35	60	389	205	62%‡	4,779
2018-11-11	295	38	n/a	333	209	-	4,803
2018-11-16	319	47	49	415	214	59%‡	4,430
2018-11-21	326	47	90	463	217	-	4,668
2018-11-23	365	47	45	457	236	57%‡	4,354
2018-11-26	374	47	74	495	241	57%‡	4,767
2018-11-30	392	48	63	503	255	58%‡	4,820
2018-12-03	405	48	79	532	268	59%‡	5,335
2018-12-07	446	48	95	589	283	57%‡	6,417
2018-12-10	452	48	n/a	500	289	58%‡	6,509
2018-12-14	483	48	111	642	313	59%‡	6,695
2018-12-21	526	48	118	692	347	60%‡	8,422
2018-12-28	548	48	52	648	361	61%‡	7,007
2019-01-04	575	48	118	741	374	60%‡	5,047
2019-01-11	595	49	n/a	644	390	61%‡	4,937
2019-01-18	636	49	209	894	416	61%‡	4,971
2019-01-25	679	54	204	937	459	63%‡	6,241
2019-02-01	720	54	168	942	481	62%‡	>7,000
2019-02-10	750	61	148	959	510	63%‡	7,846
2019-02-18	773	65	135	973	534	64%‡	6,772
2019-02-24	804	65	219	1,088	546	63%‡	5,739
2019-03-03	830	65	182	1,077	561	63%‡	5,613
2019-03-10	856	65	191	1,112	582	63%‡	4,830
2019-03-17	886	65	231	1,182	598	63%‡	4,158
2019-03-25	944	65	226	1,235	629	62%‡	4,132
2019-03-31	1,016	66	279	1,361	676	62%‡	6,989
2019-04-07	1,080	66	282	1,428	721	63%‡	7,099
2019-04-14	1,185	66	269	1,520	803	64%‡	10,461
2019-04-21	1,270	66	92	1,428	870	65%‡	5,183
2019-04-28	1,373	66	176	1,615	930	65%‡	11,841
2019-05-05	1,488	66	205	1,759	1,028	66%‡	12,969
2019-05-12	1,592	88	534	2,214	1,117	67%‡	13,174
2019-05-19	1,728	88	278	2,094	1,209	67%‡	12,608
2019-05-26	1,818	94	277	2,189	1,277	67%‡	20,415
2019-06-02	1,900	94	316	2,310	1,339	67%‡	19,465
2019-06-09	1,962	94	271	2,327	1,384	67%‡	15,045
2019-06-16 DRC & Uganda	2,051 / 3	94 / 0	319 / 1	2,468	1,440	67%‡   /100%‡	15,992 / 90	(see note 1)
2019-06-23	2,145 / 3	94 / 0	276 / 0	2,515	1,506	67%‡   /100%‡	15,903 / 110
2019-06-30	2,231 / 3	94 / 0	309 / 0	2,634	1,563	67%‡   /100%‡	18,088 / 108
2019-07-07	2,314 / 3	94 / 0	323 / 0	2,731	1,625	68%‡   /100%‡	19,227 / 0
2019-07-14	2,407 / 3	94 / 0	335 / 0	2,836	1,665	67%‡   /100%‡	19,118 / 0
2019-07-21	2,484 / 3	94 / 0	361 / 0	2,939	1,737	67%‡   /100%‡	20,505 / 19
2019-07-28 DRC	2,565	94	358	3,017	1,782	67%‡	20,072
2019-08-04	2,659	94	397	3,150	1,843	67%‡	19,156
2019-08-11	2,722	94	326	3,142	1,888	67%‡	15,988
2019-08-19	2,783	94	387	3,264	1,934	67%‡	15,817
2019-08-25	2,863	105	396	3,364	1,986	67%‡	17,293
2019-09-01	2,926	105	365	3,396	2,031	67%‡	16,370
2019-09-08	2,968	111	403	3,486	2,064	67%‡	14,737
2019-09-15	3,005	111	497	3,613	2,090	67%‡	13,294
2019-09-22	3,053	111	415	3,583	2,115	67%‡	11,335
2019-09-29	3,074	114	426	3,618	2,133	67%‡	7,775
2019-10-06	3,090	114	414	3,622	2,146	67%‡	7,807
2019-10-13	3,104	114	429	3,647	2,150	67%‡	5,622
2019-10-20	3,123	116	420	3,659	2,169	67%‡	5,570
2019-10-28	3,146	117	357	3,624	2,180	67%‡	4,437
2019-11-03	3,157	117	513	3,787	2,185	67%‡	6,078
2019-11-10	3,169	118	482	3,769	2,193	67%‡	6,137
2019-11-17	3,174	118	422	3,714	2,195	67%‡	4,857
2019-11-24	3,183	118	349	3,650	2,198	67%‡	3,371
2019-12-08	3,202	118	391	3,711	2,209	67%‡	2,955
2019-12-22	3,240	118	446	3,804	2,224	66%‡	5,137
2020-01-05	3,270	118	464	3,852	2,233	66%‡	4,133
2020-01-19	3,293	119	438	3,854	2,241	66%‡	5,018
2020-02-02	3,305	123	447	3,879	2,250	66%‡	2,374
2020-02-16	3,309	123	504	3,936	2,253	66%‡	1,972
2020-03-29	3,310	143	232	3,685	2,273	66%‡	-
2020-06-25x	3,313	153	0	3,470	2,280	66%‡	-
# These figures may increase when new cases are discovered, and fall consequently, when tests show cases were not Ebola-related. † DRC Ministry of Public Health ‡ indicates suspected cases were not counted towards CFR x indicates 42 days have passed since the last case and outbreak is declared over

Containment and military conflict

Further information: Second Congo War

Further information: Kivu conflict

Goma, the capital of North Kivu province

At the time of the epidemic, there were about 70 armed military groups, among them the Alliance of Patriots for a Free and Sovereign Congo and the Mai-Mayi Nduma défense du Congo-Rénové, in North Kivu. The armed fighting displaced thousands of individuals and seriously affected the response to the outbreak. According to the WHO, health care workers are to be accompanied by military personnel for protection and ring vaccination may not be possible. On 11 August 2018, it was reported that seven individuals were killed in Mayi-Moya due to a militant group, about 24 miles from the city of Beni where there were several EVD cases.

On 24 August 2018, it was reported that an Ebola-stricken physician had been in contact with some 97 individuals in an inaccessible military area, who hence could not be diagnosed. In September, it was reported that 2 peacekeepers were attacked and wounded by rebel groups in Beni, and 14 individuals were killed in a military attack. In September 2018, the WHO's Deputy Director-General for Emergency Preparedness and Response described the combination of military conflict and civilian distress as a potential "perfect storm" that could lead to a rapid worsening of the outbreak.

On 20 October 2018, an armed rebel group in the DRC killed some 13 civilians and took 12 children as hostages in Beni, which was then experiencing one of the worst outbreaks. On 11 November, six people were killed in an attack by an armed rebel group in Beni; as a consequence vaccinations were suspended there. Yet another attack reported on 17 November, in Beni by an armed rebel group forced the cessation of EVD containment efforts and WHO staff to evacuate to another DRC city for the time being. Beni continues to be the site of attacks by militant groups as 18 civilians were killed on 6 December. On 22 December it was reported that elections for the President of the DRC would go forward despite the EVD outbreak, including in the Ebola-stricken area of Beni. Four days later, on 26 December, the DRC government reversed itself to indicate those Ebola-stricken areas, such as Beni, would not vote for several months; as a consequence election protesters ransacked an Ebola assessment center in Beni. Post election tensions continued when it was reported that the DRC government had cut off internet connectivity for the population, as the vote results were yet to be released.

On 29 December 2018, Oxfam said it would suspend its work due to the ongoing violence in the DRC; on the same day, the International Rescue Committee suspended their Ebola support efforts as well. On 18 January, the African Union indicated that presidential election results announcements should be suspended in the DRC.

Virology

Fruit bats (group of Rousettus aegyptiacus)

Further information: Ebola virus

See also: Ebola virus disease § Pathophysiology

The DRC Ministry of Public Health confirmed that the new Ebola outbreak is caused by the Zaire ebolavirus species. This is the same strain that was involved in the early 2018 outbreak in western DRC.

Zaire ebolavirus strain is the most lethal of the six known strains (including the newly discovered Bombali strain); it is fatal in up to 90% of cases. Both Ebola and Marburg virus are part of the Filoviridae family.

The filovirus genome contains seven genes, including VP40. The natural reservoir of the virus is thought to be the African fruit bat, which is used in many parts of Africa as bushmeat.

Genomic epidemiology from July 2018 to Oct. 2019 of the Kivu Ebola epidemic. (Began with clade: BEN164, health zone: Monbalako, divergence: 5.285e-5, date: 10/08/18, no nucleotide mutations, to its spread to Goma, clade: GOM1887, health zone: [aforementioned] Goma, divergence: 2.062e-3, date: 7/13/19, nucleotide mutations: A3376G T3378C C3380A T3386A G3388C G3389T T3391C G3398A C3399A, AA mutations: VP35 V87A Q88K L901 to the more recent clade: MAN9501, health zone: Mandima, divergence: 1.4803-4, date: 10/10/19, no nucleotide mutations) This does not reflect the possible final clade or information, however as of Oct. 2019 the outbreak is slowing down.

Viral mechanism

A significant part of the actual EVD infection is based on immune suppression along with systemic inflammation, leading to multiple organ failure.

Transmission

Ebola virus disease is found in a variety of bodily fluids, such as breast milk, saliva, stool, blood, and semen. Due to this, the Ebola virus is an extremely infectious and contagious disease as a result of easy contact with any of these bodily fluids. Although a few transmission methods are known, there is a possibility that many other methods are unknown and must be further researched. Here are some potential routes of transmission:

• Droplets: Droplet transmission occurs when contact is made with virus-containing droplets.
• Fomites: Occurs when an individual comes in contact with a pathogen-containing surface.
• Bodily fluids: The most common way of transmitting the Ebola virus in humans is through contact with infected bodily fluids.

Those infected by EVD generally gain immunity, although it is considered possible that such immunity is only temporary. On 31 October 2019, it was reported that an EVD survivor who had been assisting at a treatment center in Beni had been reinfected with EVD and died; such an incident was unprecedented.

Containment and control

Contact tracing

Contact tracing identifies those who have been in direct contact with an infected individual and are thus at higher risk of becoming infected or infecting others. Such individuals are monitored for up to 21 days in the case of EVD.

Burials

The IFRC has called funerals "super-spreading events" as burial traditions include kissing and generally touching bodies. Safe burial teams formed by healthworkers are subject to suspicion.

Travel restrictions and border closings

On 26 July 2019, it was reported that the country of Saudi Arabia would not allow visas from the DRC after the WHO declared it an international emergency due to EVD. On 1 August 2019, the country of Rwanda closed its border with the DRC after multiple cases in the city of Goma, which borders the country in the upper Northwestern region.

Treatment

Further information: Ebola virus disease treatment research

In August 2018, the WHO evaluated the benefits and risks of several drugs used to treat EVD, including Remdesivir, ZMapp, REGN3470-3471-3479, mAb114 and favipiravir. The drug mAb114 (which is a monoclonal antibody) was deployed for the first time to treat infected individuals during this EVD outbreak.

In November 2018, the DRC gave approval to start randomized clinical trials for EVD treatment. On 12 August 2019, it was announced that two clinical trial medications were found to improve the rate of survival in those infected by EVD: REGN-EB3, a cocktail of three monoclonal Ebola antibodies, and mAb114. These two will be further used in therapy; when used shortly after infection they were found to have a 90% survival rate. ZMapp and Remdesivir were subsequently discontinued.

Vaccination

Number of vaccinated people in the epidemic area DRC

On 8 August 2018, the process of vaccination began with rVSV-ZEBOV Ebola vaccine. While several studies have shown the vaccine to be safe and protective against the virus, additional research is needed before it can be licensed. Consequently, the WHO reported that it was being used under a ring vaccination strategy with what is known as "compassionate use" to protect persons at highest risk of the Ebola outbreak, i.e. contacts of those infected, contacts of those contacts, and front-line medical personnel. As of 15 September, according to the WHO, almost a quarter of a million individuals had been vaccinated in the outbreak.

On 20 September 2019 it was reported that a second vaccine by Johnson & Johnson would be introduced in the current EVD epidemic in the DRC.

In November 2019, the World Health Organization prequalified an Ebola vaccine, rVSV-ZEBOV, for the first time. As of 22 February 2020, a total of 297,275 people had been vaccinated since the start of the outbreak.

Vaccination has helped to contain the epidemic, though military attacks and community resistance have complicated distribution of the vaccines.

Pregnant and lactating women

Based on a lack of evidence about the safety of the vaccine during pregnancy, the DRC ministry of health and the WHO decided to cease vaccinating women who are pregnant or lactating. Some authorities criticized this decision as "utterly indefensible" from an ethical perspective. They note that as caregivers of the sick, pregnant and lactating women are more likely to contract Ebola. They also note that since it is known that almost 100% of pregnant women who contract Ebola will die, a safety concern should not be a deciding factor. As of June 2019, pregnant and lactating women were also being vaccinated.

Vaccine stockpile

The DRC Ministry of Public Health reported on 16 August 2018 that 316 individuals had been vaccinated. On 24 August, the DRC indicated it had vaccinated 2,957 individuals, including 1,422 in Mabalako against the Ebola virus. By late October, more than 20,000 individuals had been vaccinated. In December, Dr. Peter Salama, who is Deputy Director-General of Emergency Preparedness and Response for WHO, reported that the current 300,000 vaccine stockpile might not be enough to contain the EVD outbreak, especially since it takes several months to make more of the Zaire EVD vaccine (rVSV-ZEBOV). On 11 December, it was reported that Beni only had 4,290 doses of vaccine in stock.

As of August 2019, Merck & Co, the producers of the vaccine in use, reported a stockpile sufficient for 500,000 individuals, with more in production.

Effectiveness

In April 2019, the WHO published the preliminary results of its research, in association with the DRC's Institut National pour la Recherche Biomedicale, into the effectiveness of the ring vaccination program, including data from 93,965 at-risk people who had been vaccinated. WHO stated that the rVSV-ZEBOV-GP vaccine had been 97.5% effective at stopping Ebola transmission. The vaccine had also reduced mortality among those who were infected after vaccination. The ring vaccination strategy was effective at reducing EVD in contacts of contacts (tertiary cases), with only two such cases being reported.

Treatment centres

In August 2018, the Mangina Ebola Treatment Center was reported to be operational. A fourth Ebola Treatment Center (after those in Mangina, Beni and Butembo) was inaugurated in September in Makeke in the Mandima Health Zone of Ituri Province. Makeke is less than five kilometers from Mangina along a well-traveled local road; the site had been proposed in August when it appeared that a second Ebola Treatment Center would be needed in the area, and space was insufficient in Mangina itself to accommodate one. By mid-September, however, there had been only two additional cases in the Mandima Health Zone, and only sporadic cases were being reported in the Mabalako Health Zone.

In February 2019, it was reported that attacks at treatment centers had been carried out in Butembo and Katwa. The motives behind the attacks were unclear. Due to the violence, international aid organizations had to stop their work in the two communities. In April, an epidemiologist from WHO was killed and two health workers injured in a militia attack on Butembo University Hospital in Katwa. In May, WHO's health emergencies chief said insecurity had become a "major impediment" to controlling the outbreak. He reported that since January there had been 42 attacks on health facilities and 85 health workers had been wounded or killed. "Every time we have managed to regain control over the virus and contain its spread, we have suffered major, major security events. We are anticipating a scenario of continued intense transmission".

Healthcare workers

Health workers must wear personal protection equipment during treatment of those affected by the virus. On 3 September 2018, WHO stated that 16 health workers had contracted the virus. On 10 December, the WHO reported that the current DRC outbreak had led to 49 healthcare workers contracting the Ebola virus, and 15 had died. As of 30 April 2019, there have been 92 health care workers in the DRC infected with EVD, of which 33 had died. With false rumors being spread by word-of-mouth and social media, residents remain mistrustful and fearful of health care workers. In January 2020, it was reported that there had been nearly 400 attacks on medical workers since the outbreak began in 2018.

Post-Ebola virus syndrome

Main article: Post-Ebola virus syndrome

In terms of prognosis, aside from the possible effects of post-Ebola syndrome, there is also the reality of survivors returning to communities where they might be shunned due to the fear many have towards the Ebola virus, hence psychosocial assistance is needed. Many survivors of EVD face serious side effects, including but not limited to the following:

• Joint pain
• Muscle pain
• Chest pain
• Hearing loss
• Hair loss
• Memory problems
• Anxiety attacks
• Vision loss

History

Colorized scanning electron micrograph of Ebola virus particles (green)

Further information: List of Ebola outbreaks and List of epidemics

The Ebola virus disease outbreak in Zaire (Yambuku) started in late 1976, and was the second outbreak ever after the earlier one in Sudan the same year. On 1 August 2018, the tenth Ebola outbreak was declared in the DRC, only a few days after a prior outbreak in the same country had been declared over on 24 July.

WHO chief Tedros Adhanom Ghebreyesu indicated on 15 August that the outbreak then in the DRC might be worse than the West African outbreak of 2013–2016, with the IRC connecting this to the ongoing Kivu conflict. The Kivu outbreak was the biggest of the ten recorded outbreaks recorded in the DRC.

Table 2.

Timeline of Ebola outbreaks in the Democratic Republic of the Congo (formerly Zaire) since 1976

V・T Date	Country	Major location	Outbreak information				Source
			Strain	Cases	Deaths	CFR
Aug 1976	Zaire	Yambuku	EBOV	318	280	88%
Jun 1977	Zaire	Tandala	EBOV	1	1	100%
May–Jul 1995	Zaire	Kikwit	EBOV	315	254	81%
Aug–Nov 2007	Democratic Republic of the Congo	Kasai-Occidental	EBOV	264	187	71%
Dec 2008–Feb 2009	Democratic Republic of the Congo	Kasai-Occidental	EBOV	32	14	45%
Jun–Nov 2012	Democratic Republic of the Congo	Orientale	BDBV	77	36	47%
Aug–Nov 2014	Democratic Republic of the Congo	Tshuapa	EBOV	66	49	74%
May–Jul 2017	Democratic Republic of the Congo	Likati	EBOV	8	4	50%
Apr–Jul 2018	Democratic Republic of the Congo	Équateur Province	EBOV	54	33	61%
Aug 2018–June 2020	Democratic Republic of the Congo	Kivu	EBOV	3,470	2,280	66%
June–Nov 2020	Democratic Republic of the Congo	Équateur Province	EBOV	130	55	42%
Feb 2021–May 2021	Democratic Republic of the Congo	North Kivu	EBOV	12	6	50%
April 2022	Democratic Republic of the Congo	Équateur Province	EBOV	5	5	100%
August 2022	Democratic Republic of the Congo	North Kivu	EBOV	1	1	100%

Learning from other responses, such as in the 2000 outbreak in Uganda, the WHO established its Global Outbreak Alert and Response Network, and other public health measures were instituted in areas at high risk. Field laboratories were established to confirm cases, instead of shipping samples to South Africa. Additionally, the outbreak was closely monitored by the CDC Special Pathogens Branch.

Ebola (and Marburg virus) outbreaks on the African continent

Outlook

Democratic Republic of the Congo EVD outbreaks 1976-9 November 2018 (total cases for this date does not reflect 52 suspected cases)
(Uganda has second most EVD cases '00–'01/425
West African Ebola virus epidemic '13-'16/ >28,000)

Projected cases

Until the outbreak in North Kivu in 2018, no outbreak had surpassed 320 total cases in the Democratic Republic of the Congo. By 24 February 2019, the epidemic had surpassed 1,000 total cases (1,048), and a year later, it had surpassed 3,000.

On 10 May 2019, the U.S. Centers for Disease Control and Prevention indicated that the outbreak could eventually surpass the West African epidemic.

The 12 May 2019 issue of WHO Weekly Bulletin on Outbreaks and Other Emergencies, indicates that "continued increase in the number of new EVD cases in the Democratic Republic of the Congo is worrying...no end in sight to the difficult security situation".

Statistical measures

One way to measure the outbreak is via the basic reproduction number, R₀, a statistical measure of the average number of people expected to be infected by one person with a disease. If the basic reproduction number is less than 1, the infection dies out; if it is greater than 1, the infection continues to spread—with exponential growth in the number of cases. A March 2019 paper by Tariq et al. suggested that R₀ was oscillating around 0.9.

Response

During the Ebola outbreak in Democratic Republic of the Congo, a number of organizations helped in different capacities: CARITAS DRC, CARE International, Cooperazione Internationale (COOPE), Catholic Organization for Relief and Development Aid (CORDAID/PAP-DRC), International Rescue Committee (IRC), Médecins Sans Frontières (MSF), Oxfam, International Federation of Red Cross and Red Crescent Societies (IFRC), International Committee of the Red Cross (ICRC), and Samaritan's Purse.

WHO

WHO has only declared six PHEICs in its history.

On 12 April 2019, the WHO Emergency Committee was reconvened by the WHO Director-General after an increase in the rate of new cases, and determined that the outbreak still failed to meet the criteria for a Public Health Emergency of International Concern (PHEIC).

Following the confirmation of Ebola crossing into Uganda, a third review by the WHO on 14 June 2019 concluded that while the outbreak was a health emergency in the DRC and the region, it did not meet all three criteria required for a PHEIC. Following a case in Goma, the reconvening of a fourth review was announced on 15 July 2019. The WHO officially declared the situation a PHEIC on 17 July 2019, and as of 12 February 2020, it continues to be a PHEIC.

World Bank

The World Bank was criticised when its Pandemic Emergency Financing Facility, a fund backed by private finance and intended to support countries affected by pandemic diseases, had only paid out $31 million of a potential total of $425 million by August 2019 while generating substantial returns for investors. The conditions used to decide when the fund should pay out to disease-affected countries were criticised as too stringent.

International governments

Financial support has been contributed by the governments of the US and the UK, among others. The UK DfID minister, Rory Stewart, visited the area in July 2019, and called for other western countries, including Canada, France and Germany, to donate more financial aid. He identified a funding deficit of $100–300 million to continue responding to the outbreak until December. He urged WHO to classify the situation as a PHEIC, to facilitate the release of international aid.

2020 Équateur Province outbreak and other health problems

On 1 June 2020, the Congolese health ministry announced a new DRC outbreak of Ebola in Mbandaka, Équateur Province, a region along the Congo River. Genome sequencing suggests that this outbreak, the 11th outbreak since the virus was first discovered in the country in 1976, is unrelated to the one in North Kivu Province or the previous outbreak in the same area in 2018. It was reported that six cases had been identified with four fatalities. It is expected that more people will be identified as surveillance activities increase.

The Équateur Province was the site of a small Ebola outbreak in 2018, which infected 53 people and resulted in 29 deaths. That outbreak was quickly brought under control with the use of the Ebola vaccine. The WHO is assisting with the response to this outbreak in part using the structures put in place for the 2018 outbreak. Testing and contact tracing is underway and additional medical staff has been sent in. Médecins Sans Frontières is also on hand to give assistance if needed. The outbreak adds to an already difficult time for the Congo due to both COVID-19 cases (whose current worldwide total is over 15 million cases) and a large measles outbreak that has caused almost 7000 deaths since 2019.

By 8 June, a total of 12 cases had been identified in and around Mbandaka and 6 deaths due to the virus. The WHO said 300 people in Mbandaka and the surrounding Équateur province had been vaccinated. By 15 June the case count had increased to 17 with 11 deaths, with more than 2,500 people having been vaccinated. On 6 August, it had increased to 74 cases and 32 deaths, despite an effective vaccine being available.

See also

• 2014 Democratic Republic of the Congo Ebola virus outbreak
• 2017 Democratic Republic of the Congo Ebola virus outbreak
• Filoviridae
• Haemorrhagic fever
• rVSV-ZEBOV vaccine

Further reading

• "FDA approves an Ebola vaccine, long in development, for the first time". STAT. 20 December 2019. Retrieved 22 December 2019.
• Dokubo, Emily Kainne; Wendland, Annika; Mate, Suzanne E; et al. (September 2018). "Persistence of Ebola virus after the end of widespread transmission in Liberia: an outbreak report". The Lancet Infectious Diseases. 18 (9): 1015–1024. doi:10.1016/S1473-3099(18)30417-1. PMID 30049622.
• Nanclares, Carolina; Kapetshi, Jimmy; Lionetto, Fanshen; et al. (September 2016). "Ebola Virus Disease, Democratic Republic of the Congo, 2014". Emerging Infectious Diseases. 22 (9): 1579–1586. doi:10.3201/eid2209.160354. PMC 4994351. PMID 27533284.
• Claude, Kasereka Masumbuko; Underschultz, Jack; Hawkes, Michael T (October 2018). "Ebola virus epidemic in war-torn eastern DR Congo". The Lancet. 392 (10156): 1399–1401. doi:10.1016/S0140-6736(18)32419-X. PMID 30297137.
• "Experimental Ebola vaccines elicit year-long immune response/NIH reports final data from large clinical trial in West Africa". National Institutes of Health (NIH). NIH.gov. 11 October 2017.
• Kuhn, Jens; Andersen, Kristian; Baize, Sylvain; et al. (24 November 2014). "Nomenclature- and Database-Compatible Names for the Two Ebola Virus Variants that Emerged in Guinea and the Democratic Republic of the Congo in 2014". Viruses. 6 (11): 4760–4799. doi:10.3390/v6114760. PMC 4246247. PMID 25421896.{{cite journal}}: CS1 maint: unflagged free DOI (link)
• Jones-Konneh, Tracey Elizabeth Claire; Suda, Tomomi; Sasaki, Hiroyuki; et al. (2018). "Agent-Based Modeling and Simulation of Nosocomial Infection among Healthcare Workers during Ebola Virus Disease Outbreak in Sierra Leone". The Tohoku Journal of Experimental Medicine. 245 (4): 231–238. doi:10.1620/tjem.245.231. PMID 30078788.
• "International travel and health". World Health Organization (WHO). Retrieved 16 August 2018.
• "Rising to the Ebola challenge, again". Nature Microbiology. 3 (9): 965. 16 August 2018. doi:10.1038/s41564-018-0243-2. PMID 30115963. S2CID 52019660.
• Lévy, Yves; Lane, Clifford; Piot, Peter; et al. (September 2018). "Prevention of Ebola virus disease through vaccination: where we are in 2018". The Lancet. 392 (10149): 787–790. doi:10.1016/S0140-6736(18)31710-0. PMC 6128979. PMID 30104048.
• Dhama, Kuldeep; Karthik, Kumaragurubaran; Khandia, Rekha; et al. (2018). "Advances in Designing and Developing Vaccines, Drugs, and Therapies to Counter Ebola Virus". Frontiers in Immunology. 9: 1803. doi:10.3389/fimmu.2018.01803. PMC 6095993. PMID 30147687.{{cite journal}}: CS1 maint: unflagged free DOI (link)
• West, Brandyn R.; Moyer, Crystal L.; King, Liam B.; et al. (11 September 2018). "Structural Basis of Pan-Ebolavirus Neutralization by a Human Antibody against a Conserved, yet Cryptic Epitope". mBio. 9 (5). doi:10.1128/mBio.01674-18. PMC 6134094. PMID 30206174.
• Nakkazi, Esther (August 2018). "DR Congo Ebola virus outbreak: responding in a conflict zone". The Lancet. 392 (10148): 623. doi:10.1016/S0140-6736(18)31981-0. PMID 30152332.
• Juan-Giner, Aitana; Tchaton, Marie; Jemmy, Jean-Paul; et al. (2019). "Safety of the rVSV ZEBOV vaccine against Ebola Zaire among frontline workers in Guinea". Vaccine. 37 (48): 7171–7177. doi:10.1016/j.vaccine.2018.09.009. PMID 30266489.
• De Nys, Helene M.; Kingebeni, Placide Mbala; Keita, Alpha K.; et al. (December 2018). "Survey of Ebola Viruses in Frugivorous and Insectivorous Bats in Guinea, Cameroon, and the Democratic Republic of the Congo, 2015–2017". Emerging Infectious Diseases. 24 (12): 2228–2240. doi:10.3201/eid2412.180740. PMC 6256401. PMID 30307845.
• Brett-Major, David; Lawler, James (19 August 2018). "Catching Chances: The Movement to Be on the Ground and Research Ready before an Outbreak". Viruses. 10 (8): 439. doi:10.3390/v10080439. PMC 6116208. PMID 30126221.{{cite journal}}: CS1 maint: unflagged free DOI (link)
• Cousins, Sophie (December 2018). "Violence and community mistrust hamper Ebola response". The Lancet Infectious Diseases. 18 (12): 1314–1315. doi:10.1016/S1473-3099(18)30658-3. PMID 30385158.
• Owens, Michael D.; Rice, Jason (2019). "The Angolan Pandemic Rapid Response Team: An Assessment, Improvement, and Development Analysis of the First Self-sufficient African National Response Team Curriculum". Disaster Medicine and Public Health Preparedness. 13 (3): 577–581. doi:10.1017/dmp.2018.122. PMID 30479245.
• Den Boon, Saskia; Marston, Barbara J.; Nyenswah, Tolbert G.; et al. (February 2019). "Ebola Virus Infection Associated with Transmission from Survivors". Emerging Infectious Diseases. 25 (2): 249–255. doi:10.3201/eid2502.181011. PMC 6346469. PMID 30500321.
• Coltart, Cordelia E. M.; Lindsey, Benjamin; Ghinai, Isaac; et al. (26 May 2017). "The Ebola outbreak, 2013–2016: old lessons for new epidemics". Philosophical Transactions of the Royal Society B: Biological Sciences. 372 (1721): 20160297. doi:10.1098/rstb.2016.0297. PMC 5394636. PMID 28396469.
• Okoror, Lawrence; Kamara, Abdul; Kargbo, Brima; et al. (6 November 2018). "Transplacental transmission: A rare case of Ebola virus transmission". Infectious Disease Reports. 10 (3): 7725. doi:10.4081/idr.2018.7725. PMC 6297901. PMID 30631407.
• Allegranzi, Benedetta; Ivanov, Ivan; Harrell, Mason; et al. (22 November 2018). "Infection Rates and Risk Factors for Infection Among Health Workers During Ebola and Marburg Virus Outbreaks: A Systematic Review". The Journal of Infectious Diseases. 218 (suppl_5): S679–S689. doi:10.1093/infdis/jiy435. PMC 6249600. PMID 30202878.
• Ilunga Kalenga, Oly; Moeti, Matshidiso; Sparrow, Annie; et al. (29 May 2019). "The Ongoing Ebola Epidemic in the Democratic Republic of Congo, 2018–2019". New England Journal of Medicine. 0 (4): 373–383. doi:10.1056/NEJMsr1904253. ISSN 0028-4793. PMID 31141654.
• Burki, Talha (November 2019). "DRC getting ready to introduce a second Ebola vaccine". The Lancet. Infectious Diseases. 19 (11): 1174–1175. doi:10.1016/S1473-3099(19)30577-8. ISSN 1474-4457. PMID 31657782. Retrieved 31 October 2019.

External links

• World Health Organization Democratic Republic of the Congo crisis information
• World Health Organization Ebola situation reports
• "Ebola outbreak: timeline". Médecins Sans Frontières/Doctors Without Borders. 13 September 2016.
• "Ebola Virus Disease Outbreak Uganda Situation Reports". World Health Organization (WHO). Retrieved 20 June 2019.
• "Genomic epidemiology of the 2018–19 Ebola epidemic". nextstrain.org. Retrieved 9 November 2019.open source
• "Safety and Health Topics | Ebola | Occupational Safety and Health Administration". www.osha.gov. Retrieved 9 January 2020.

Video

Perform Hand Hygiene CDC05

• "Donning PPE: Perform Hand Hygiene Personal Protective Equipment (PPE) | Ebola (Ebola Virus Disease) | CDC". Centers for Disease Control and Prevention (CDC). Retrieved 15 September 2018.
• "Contact tracing/U.S. Department of Health and Human Services Centers for Disease Control and Prevention". Centers for Disease Control and Prevention (CDC). Retrieved 15 September 2018.