It only takes one bite from an infected mosquito to cause a severe illness. There is no vaccine or specific treatment for West Nile.

The first case of West Nile Virus in Michigan this year has been detected in Livingston County, the state health department announced Friday. The risk of mosquito-borne illness reaches its peak in August and September,

Louisiana’s first human case of West Nile in Orleans Parish comes as mosquito activity climbs, with 10 others infected statewide and hundreds of positive mosquito pools detected.