The West Nile virus itself is thought to have originated in the West Nile district of Uganda. From Uganda it began to spread using its main carrier the Birds. It spread to Egypt, France and in 1999 it made very startling appearance in New York. The way the virus travels is mostly by infected mosquitoes. The mosquito will bite an animal and take some of its blood, as this is occurring the virus enters the blood stream and the animal becomes infected. …
