West Nile virus, transmitted to man primarily by mosquitoes, was first isolated in 1937 in Uganda and later observed in the Middle East, Asia, Oceania, and Europe.
Virus Nil Barat, yang ditularkan ke manusia terutama oleh nyamuk, pertama kali diisolasikan pada tahun 1937 di Uganda dan belakangan diamati di Timur Tengah, Asia, Oseania, serta di Eropa.