West Nile is a viral infection primarily spread by mosquitoes. It was first identified in Uganda in 1937 and has since spread to many parts of the world, including North America. Most people infected with the virus do not show symptoms, but some may experience fever, headache, and body aches. In rare cases, West Nile virus can lead to severe neurological diseases, such as West Nile encephalitis or West Nile meningitis. These conditions can cause serious complications, particularly in older adults and individuals with weakened immune systems. Preventive measures include using insect repellent and eliminating standing water where mosquitoes breed.