A fourth person in Michigan has died from West Nile Virus, according to the state Department of Community Health.
The victim is an 86-year-old woman from Wayne County.
As of Wednesday, there are 80 cases of the virus in the state.
The virus has also been seen in livestock and wildlife.
The state is urging people to take precautions over the holiday weekend, when people typically spend more time outside.
Among the tips:
--- Use insect repellant that contains DEET, picaridin, oil of lemon ducalyptus or other EPA-approved repllent to exposed skin or clothing.
--- Avoid being outdoors at dusk and dawn, when mosquitos are most active.
--- Maintain window and door screening to help keep mosquitos out of buildings.
--- Empty water from mosquito breeding sites such as buckets, unused kiddie pools, old tires or similar sites wheres mosquitos lay their eggs.
--- When outside, clothing that is light-colored, including long-sleeved shirts and long pants.