At present Kerala is affected by West Nile Fever in a threatening manner. West Nile Fever is a word that scares and disturbs the people of Kerala a lot. West Nile Fever is not a new disease. West Nile Fever, a mosquito-borne disease, was first identified in Uganda in 1937. A woman from West Nile district was infected with this fever for the first time, hence the name West Nile Fever. In 1999, this flu outbreak occurred in North America.