Known Cases and Outbreaks of Ebola Virus Disease, in Reverse Chronological 
Order:Year(s)CountryEbola subtypeReported number of human casesReported 
number (%) of deaths among casesSituationMarch 2014-PresentMultiple 
countries 
<http://www.cdc.gov/vhf/ebola/outbreaks/2014-west-africa/distribution-map.html#areas>Ebola
 
virus4655*2431 (52%)*Ongoing outbreak across multiple countries 
<http://www.cdc.gov/vhf/ebola/outbreaks/2014-west-africa/distribution-map.html#areas>
 
in West Africa. Number of patients is constantly evolving due to the 
ongoing investigation. 32 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#thirtytwo> 
November 
2012-January 2013UgandaSudan virus6*3* (50%)Outbreak occurred in the Luwero 
District. CDC assisted the Ministry of Health in the epidemiologic and 
diagnostic aspects of the outbreak. Testing of samples by CDC's Viral 
Special Pathogens Branch occurred at UVRI in Entebbe. 31 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#thirtyone> 
June-November 
2012Democratic Republic of the CongoBundibugyo virus36*13* (36.1%)Outbreak 
occurred in DRC’s Province Orientale. Laboratory support was provided 
through CDC and the Public Health Agency of Canada (PHAC)’s field 
laboratory in Isiro, and through the CDC/UVRI lab in Uganda. The outbreak 
in DRC has no epidemiologic link to the near contemporaneous Ebola outbreak 
in the Kibaale district of Uganda. 31 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#thirtyone> 
June-October 
2012UgandaSudan virus11*4* (36.4%)Outbreak occurred in the Kibaale District 
of Uganda. Laboratory tests of blood samples were conducted by the UVRI and 
the U.S. Centers for Disease Control and Prevention (CDC). 31 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#thirtyone>May 
2011UgandaSudan virus11 (100%)The Ugandan Ministry of Health informed the 
public that a patient with suspected Ebola Hemorrhagic fever died on May 6, 
2011 in the Luwero district, Uganda. The quick diagnosis from a blood 
sample of Ebola virus was provided by the new CDC Viral Hemorrhagic Fever 
laboratory installed at the Uganda Viral Research Institute (UVRI). 30 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#thirty>December 
2008-February 2009Democratic Republic of the CongoEbola virus3215 (47%)Outbreak 
occurred in the Mweka and luebo health zones of the Province of Kasai 
Occidental. 29 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#twentynine> 
November 
2008PhilippinesReston virus6 (asymptomatic)0First known occurrence of 
Ebola-Reston in pigs. Strain closely similar to earlier strains. Six 
workers from the pig farm and slaughterhouse developed antibodies but did 
not become sick. 27 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#twentyseven> 
28 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#twentyeight> 
December 
2007-January 2008UgandaBundibugyo virus14937 (25%)Outbreak occurred in 
Bundibugyo District in western Uganda. First reported occurance of a new 
strain. 26 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#twentysix> 
2007Democratic Republic of CongoEbola virus264187 (71%)Outbreak occurred in 
Kasai Occidental Province. The outbreak was declared over November 20. Last 
confirmed case on October 4 and last death on October 10. 24 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#twentyfour> 
25 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#twentyfive> 
2004RussiaEbola virus11 (100%)Laboratory contamination. 23 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#twentythree>
2004Sudan (South Sudan)Sudan virus177 (41%)Outbreak occurred in Yambio 
county of southern Sudan. This outbreak was concurrent with an outbreak of 
measles in the same area, and several suspected EHF cases were later 
reclassified as measeles cases. 22 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#twentytwo> 
November-December 
2003Republic of CongoEbola virus3529 (83%)Outbreak occured in Mbomo and 
Mbandza villages located in Mbomo distric, Cuvette Ouest Département. 21 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#twentyone> 
December 
2002-April 2003Republic of CongoEbola virus143128 (89%)Outbreak occurred in 
the districts of Mbomo and Kéllé in Cuvette Ouest Département. 20 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#twenty> October 
2001-March 2002Republic of CongoEbola virus5743 (75%)Outbreak occurred over 
the border of Gabon and the Republic of the Congo. This was the first time 
that Ebola hemorrhagic fever was reported in the Republic of the Congo. 19 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#nineteen> 
October 
2001-March 2002GabonEbola virus6553 (82%)Outbreak occured over the border 
of Gabon and the Republic of the Congo. 19 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#nineteen> 
2000-2001UgandaSudan virus425224 (53%)Occurred in Gulu, Masindi, and 
Mbarara districts of Uganda. The three most important risks associated with 
Ebola virus infection were attending funerals of Ebola hemorrhagic fever 
case-patients, having contact with case-patients in one's family, and 
providing medical care to Ebola case-patients without using adequate 
personal protective measures. 18 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#eighteen> 
1996RussiaEbola virus11 (100%)Laboratory contamination 17 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#seventeen>
1996PhilippinesReston virus00Ebola-Reston virus was identified in a mokey 
export facility in the Philippines. No human infections were identified. 16 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#sixteen>1996
USAReston virus00Ebola-Reston virus was introduced into a quarantine 
facility in Texas by monkeys imported from the Philippines. No human 
infections were identified. 15 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#fifteen>1996South
 
AfricaEbola virus21 (50%)A medical professional traveled from Gabon to 
Johannesburg, South Africa, after having treated Ebola virus-infected 
patients and thus having been exposed to the virus. He was hospitalized, 
and a nurse who took care of him became infected and died. 14 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#fourteen>1996-1997
 
(July-January)GabonEbola virus6045 (74%)Occurred in Booué area with 
transport of patients to Libreville. Index case-patient was a hunter who 
lived in a forest camp. Disease was spread by close contact with infected 
persons. A dead chimpanzee found in the forest at the time was determined 
to be infected. 11 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#eleven>1996 
(January-April)GabonEbola virus3721 (57%)Occured in Mayibout area. A 
chimpanzee found dead in the forest was eaten by people hunting for food. 
Nineteen people who were involved in the butchery of the animal became ill; 
other cases occured in family members. 11 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#eleven>1995Democratic
 
Republic of the Congo (formerly Zaire)Ebola virus315250 (81%)Occured in 
Kikwit and surrounding area. Traced to index case-patient who worked in 
forest adjoining the city. Epidemic spread through families and hospitals. 
13 <http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#thirteen>
1994Côte d'Ivoire (Ivory Coast)Taï Forest virus10Scientist became ill after 
conducting an autopsy on a wild chimpanzee in the Tai Forest. The patient 
was treated in Switzerland. 12 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#twelve>1994
GabonEbola virus5231 (60%)Occured in Mékouka and other gold-mining camps 
deep in the rain forest. Initially thought to be yellow fever; identified 
as Ebola hemorrhagic fever in 1995. 11 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#eleven>1992
ItalyReston virus00Ebola-Reston virus was introduced into quarantine 
facilities in Sienna by monkeys imported from the same export facility in 
the Philippines that was involved in the episodes in the United States. No 
humans were infected. 10 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#ten>
1989-1990PhilippinesReston virus3 (asymptomatic)0High mortality among 
cynomolgus macaques in a primate facility responsible for exporting animals 
in the USA. 8 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#eight>
Three workers in the animal facility developed antibodies but did not get 
sick. 9 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#nine>1990USAReston
 
virus4 (asymptomatic)0Ebola-Reston virus was introduced once again into 
quarantine facilities in Virginia, and Texas by monkeys imported from the 
Philippines. Four humans developed antibodies but did not get sick. 7 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#seven>1989
USAReston virus00Ebola-Reston virus was introduced into quarantine 
facilities in Virginia and Pennsylvania by monkeys imported from the 
Philippines. 6 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#six>1979Sudan 
(South Sudan)Sudan virus3422 (65%)Occured in Nzara, Maridi. Recurrent 
outbreak at the same site as the 1976 Sudan epidemic. 5 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#five>1977
ZaireEbola virus11 (100%)Noted retrospectively in the village of Tandala. 4 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#four>1976
EnglandSudan virus10Laboratory infection by accidental stick of 
contaminated needle. 3 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#three>1976Sudan 
(South Sudan)Sudan virus284151 (53%)Occurred in Nzara, Maridi and the 
surrounding area. Disease was spread mainly through close personal contact 
within hospitals. Many medical care personnel were infected. 2 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#two>1976Zaire 
(Democratic Republic of the Congo - DRC)Ebola virus318280 (88%)Occurred in 
Yambuku and surrounding area. Disease was spread by close personal contact 
and by use of contaminated needles and syringes in hospitals/clinics. This 
outbreak was the first recognition of the disease. 1 
<http://www.cdc.gov/vhf/ebola/outbreaks/history/chronology.html#one>

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