Boone County officials are reporting the first positive test in a bird in 2015 for West Nile Virus.

Last year, four people in Illinois died from West Nile virus. Winnebago County reported its first case of West Nile just last week.

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WNV is transmitted through the bite of a mosquito that has picked up the virus by feeding on an infected bird. West Nile virus is an infection that can cause serious illness, but most people infected with WNV have no signs or symptoms of illness. Persons at the highest risk for serious illness are those 50 years of age or older.

You can find more information on West Nile virus via the Illinois Department of Public Health, the Center for Disease Control,