This list of Ebola outbreaks records the known occurrences of

Ebola virus disease Ebola, also known as Ebola virus disease (EVD) and Ebola hemorrhagic fever (EHF), is a viral hemorrhagic fever in humans and other primates, caused by ebolaviruses. Symptoms typically start anywhere between two days and three weeks after becom ...

, a highly infectious and acutely lethal viral disease that has afflicted humans and animals primarily in

equatorial Africa Equatorial Africa is an ambiguous term that sometimes is used to refer either to the equatorial region of Sub-Saharan Africa traversed by the Equator, more broadly to tropical Africa or in a biological and geo-environmental sense to the intra-tr ...

. The

pathogens In biology, a pathogen ( el, πάθος, "suffering", "passion" and , "producer of") in the oldest and broadest sense, is any organism or agent that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ ...

responsible for the disease are the five

ebolavirus The genus ''Ebolavirus'' (- or ; - or ) is a virological taxon included in the family '' Filoviridae'' (filament-shaped viruses), order ''Mononegavirales''. The members of this genus are called ebolaviruses, and encode their genome in the for ...

es recognized by the

International Committee on Taxonomy of Viruses The International Committee on Taxonomy of Viruses (ICTV) authorizes and organizes the taxonomic classification of and the nomenclatures for viruses. The ICTV has developed a universal taxonomic scheme for viruses, and thus has the means to app ...

Ebola virus ''Zaire ebolavirus'', more commonly known as Ebola virus (; EBOV), is one of six known species within the genus ''Ebolavirus''. Four of the six known ebolaviruses, including EBOV, cause a severe and often fatal hemorrhagic fever in humans and ot ...

(EBOV), Sudan virus (SUDV),

Reston virus Reston virus (RESTV) is one of six known viruses within the genus '' Ebolavirus''. Reston virus causes Ebola virus disease in non-human primates; unlike the other five ebolaviruses, it is not known to cause disease in humans, but has caused asymp ...

(RESTV), Taï Forest virus (TAFV), and

Bundibugyo virus The species ''Bundibugyo ebolavirus'' ( ) is the taxonomic home of one virus, Bundibugyo virus (BDBV), that forms filamentous virions and is closely related to the infamous Ebola virus (EBOV). The virus causes severe disease in humans in the form ...

(BDBV). Four of the five

variants Variant may refer to: In arts and entertainment * ''Variant'' (magazine), a former British cultural magazine * Variant cover, an issue of comic books with varying cover art * ''Variant'' (novel), a novel by Robison Wells * " The Variant", 2021 e ...

have caused the disease in humans as well as other animals; RESTV has caused clinical symptoms only in non-human

primate Primates are a diverse order of mammals. They are divided into the strepsirrhines, which include the lemurs, galagos, and lorisids, and the haplorhines, which include the tarsiers and the simians (monkeys and apes, the latter including huma ...

s. RESTV has caused

subclinical In medicine, any disease is classified asymptomatic if a patient tests as carrier for a disease or infection but experiences no symptoms. Whenever a medical condition fails to show noticeable symptoms after a diagnosis it might be considered asym ...

infections in humans, producing an

antibody An antibody (Ab), also known as an immunoglobulin (Ig), is a large, Y-shaped protein used by the immune system to identify and neutralize foreign objects such as pathogenic bacteria and viruses. The antibody recognizes a unique molecule of the ...

response but no visual symptoms or disease state manifestations. Transmission of the ''ebolaviruses'' between

natural reservoir In infectious disease ecology and epidemiology, a natural reservoir, also known as a disease reservoir or a reservoir of infection, is the population of organisms or the specific environment in which an infectious pathogen naturally lives and rep ...

s and humans is rare, and outbreaks of Ebola virus disease are often traceable to a single case where an individual has handled the carcass of a

gorilla Gorillas are herbivorous, predominantly ground-dwelling great apes that inhabit the tropical forests of equatorial Africa. The genus ''Gorilla'' is divided into two species: the eastern gorilla and the western gorilla, and either four or fi ...

chimpanzee The chimpanzee (''Pan troglodytes''), also known as simply the chimp, is a species of great ape native to the forest and savannah of tropical Africa. It has four confirmed subspecies and a fifth proposed subspecies. When its close relative th ...

bat Bats are mammals of the order Chiroptera.''cheir'', "hand" and πτερόν''pteron'', "wing". With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more agile in flight than most ...

s, or

duiker A duiker is a small to medium-sized brown antelope native to sub-Saharan Africa, found in heavily wooded areas. The 22 extant species, including three sometimes considered to be subspecies of the other species, form the subfamily Cephalophina ...

. The virus then spreads person-to-person, especially within families, in hospitals, and during some

mortuary A morgue or mortuary (in a hospital or elsewhere) is a place used for the storage of human corpses awaiting identification (ID), removal for autopsy, respectful burial, cremation or other methods of disposal. In modern times, corpses have cus ...

ritual A ritual is a sequence of activities involving gestures, words, actions, or objects, performed according to a set sequence. Rituals may be prescribed by the traditions of a community, including a religious community. Rituals are characterized, b ...

s where contact among individuals becomes more likely. Learning from failed responses, such as during the 2000 outbreak in

Uganda }), is a landlocked country in East Africa East Africa, Eastern Africa, or East of Africa, is the eastern subregion of the African continent. In the United Nations Statistics Division scheme of geographic regions, 10-11-(16*) territor ...

, the

World Health Organization The World Health Organization (WHO) is a specialized agency of the United Nations responsible for international public health. The WHO Constitution states its main objective as "the attainment by all peoples of the highest possible level of h ...

(WHO) established its

Global Outbreak Alert and Response Network The Global Outbreak Alert and Response Network (GOARN) is a network composed of numerous technical and public health institutions, laboratories, NGOs, and other organizations that work to observe and respond to threatening epidemics. GOARN works clo ...

, and other

public health Public health is "the science and art of preventing disease, prolonging life and promoting health through the organized efforts and informed choices of society, organizations, public and private, communities and individuals". Analyzing the det ...

measures were instituted in areas at high risk. Field laboratories were established to confirm cases, instead of shipping samples to

South Africa South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countri ...

. Outbreaks are also closely monitored by the United States

Centers for Disease Control and Prevention The Centers for Disease Control and Prevention (CDC) is the national public health agency of the United States. It is a United States federal agency, under the Department of Health and Human Services, and is headquartered in Atlanta, Georgi ...

(CDC) Special Pathogens Branch.

Nigeria Nigeria ( ), , ig, Naìjíríyà, yo, Nàìjíríà, pcm, Naijá , ff, Naajeeriya, kcg, Naijeriya officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf o ...

was the first country in

western Africa West Africa or Western Africa is the westernmost region of Africa. The United Nations defines Western Africa as the 16 countries of Benin, Burkina Faso, Cape Verde, The Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Maurita ...

to successfully curtail the virus, and its procedures have served as a model for other countries to follow.

Events

The information in the following tables comes from the

(WHO). This data excludes all laboratory personnel cases,

cases (since they are all

asymptomatic In medicine, any disease is classified asymptomatic if a patient tests as carrier for a disease or infection but experiences no symptoms. Whenever a medical condition fails to show noticeable symptoms after a diagnosis it might be considered asy ...

), and suspected cases. For a complete overview, those cases are included below with footnotes and supporting sources.

Events

Major or massive cases

Minor or single cases

List of other Filoviridae outbreaks

See also

Notes

References

Further reading