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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