West Nile virus is the leading cause of mosquito-borne disease in the continental US, according to the Centers for Disease Control and Prevention. The illness typically peaks around this time of year.
New York was the latest state to report infected mosquitos last week. In a press release, Rockland County reported two groups of mosquitos carrying the virus in Orangetown and Clarktown. Fortunately, no humans have been infected yet.
Massachusetts also reported its first West Nile-infected mosquito of the season with no known human cases. However, Arizona, Arkansas, Illinois, and Iowa have each seen one or two people fall severely ill with the virus this summer, according to the CDC.