Has been historically confined to Africa, the Middle East, and parts of Russia, India and Indonesia.1
The virus’s origin dates back to 1937, when it was isolated from a woman in the West Nile District of Uganda.2
Basis for the name of the virus.2
The pathogenicity of the virus in humans was discovered in the 1950s, and in animals during the 1960s.2
Spread into Europe by migratory birds.1
During the investigation of an encephalitis outbreak in New York City in Sept 1999, West Nile Virus was first discovered in North America.2
Also spread into Canada and the Caribbean, and most U.S states.1
Is endemic in Africa.2
Latest severe outbreak of West Nile Virus occurred in 2012 in the U.S.1
2,873 cases of West Nile neuroinvasive disease (West Nile Meningitis
The virus’s origin dates back to 1937, when it was isolated from a woman in the West Nile District of Uganda.2
Basis for the name of the virus.2
The pathogenicity of the virus in humans was discovered in the 1950s, and in animals during the 1960s.2
Spread into Europe by migratory birds.1
During the investigation of an encephalitis outbreak in New York City in Sept 1999, West Nile Virus was first discovered in North America.2
Also spread into Canada and the Caribbean, and most U.S states.1
Is endemic in Africa.2
Latest severe outbreak of West Nile Virus occurred in 2012 in the U.S.1
2,873 cases of West Nile neuroinvasive disease (West Nile Meningitis