What is the causative agent of West Nile fever?

Kerala’s health department confirms five West Nile fever cases in Kozhikode, Malappuram, and Thrissur districts. Health Minister Veena George orders increased mosquito control measures. Four patients have recovered; one remains under observation. Kerala recorded its first West Nile case in 2011 and first death in 2022. The virus, traced back to Uganda in 1937, primarily infects birds and spreads via migratory birds. It’s a flavivirus, with global cases from Africa to the Americas. West Nile Fever, caused by the West Nile Virus (WNV), is a flavivirus commonly found in Africa, Europe, and the Americas. It primarily spreads through infected mosquitoes biting birds and occasionally humans.