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No human cases of West Nile in Michigan yet


Just two years after 17 deaths, Michigan so far is reporting no human cases of West Nile virus in 2014.


A snowy winter and wet spring might lead to more mosquitoes, the carrier of West Nile. But that doesn't automatically translate into a greater risk for getting the virus.


Ned Walker, an expert at Michigan State University, says the virus needs hot weather to become potent. The National Weather Service reports only a handful of days of 90 degrees or higher since June.


Mosquitoes pick up the virus from infected birds and then pass it to people. The elderly and people with a weak immune system are considered to be at greatest risk for death.


There were 36 human cases in Michigan last year and 202 in 2012.

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