West Nile virus is a mosquito-borne disease that can cause serious illness, including encephalitis (inflammation of the brain) and meningitis (inflammation of the membranes that surround the brain and spinal cord). The virus is spread through the bite of an infected mosquito. Mosquitoes become infected when they feed on birds that are carrying the virus. West Nile virus is most commonly found in Africa, Asia, and Europe, but it has also been found in the United States, Canada, and Mexico.
There is no specific treatment for West Nile virus infection. Treatment is supportive and includes rest, fluids, and pain relievers. Most people who are infected with West Nile virus will recover completely within a few weeks. However, some people may develop serious complications, such as encephalitis or meningitis. These complications can be fatal.
