H.i.v. Virus

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West Nile virus is a disease spread by mosquitos. The condition ranges from mild to severe.

Causes, incidence, and risk factors

West Nile virus was first identified in 1937 in Uganda in eastern Africa. It was first discovered in the United States in the summer of 1999 in New York. Since then, the virus has spread throughout the United States.

The West Nile virus is a type of virus known as a flavivirus. Researchers believe West Nile virus is spread when a mosquito bites an infected bird...

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