BOSTON (September 6, 2022) – The Massachusetts Department of Public Health (DPH) today announced the third human case of West Nile virus (WNV) in the state this year. The individual is a male in his 20s who was likely exposed to the virus in Suffolk County in an area already known to be at increased risk. The risk of human infection with WNV is moderate to high in the Greater Boston area. 

In 2021, there were 11 human cases of WNV infection identified in Massachusetts.