A human case of West Nile Virus has been confirmed in the area, according to a release from the Ionia County Health Department on Aug. 28.

It's the first reported case in Ionia County in 2025.

WNV is transmitted to humans through the bite of infected mosquitoes, according to ICHD. It’s the leading cause of mosquito-borne diseases in the U.S.

As of Aug. 22, WNV had been detected in 126 mosquito pools, 16 wild birds and six humans in the state, according to the Michigan Department of Agriculture and Rural Development .

Ionia County's diagnosis marks the seventh human case of WNV in Michigan in 2025.

There have also been human cases of WNV in counties Oakland, Emmet, Macomb, Livingston, Sanilac and Kent. The resident in Kent County died from the virus, according to the Michigan Depart

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