The first confirmed human West Nile Virus case occurred in 1999 and spread rapidly across the country. The first confirmed human case in Michigan occurred in 2002.
One thing you can do to reduce the presence of West Nile virus in your neighborhood is to limit mosquito breeding - get rid of places for females to lay eggs. Encourage your neighbors to do the same.
Cover up and wear long sleeve shirts and pants and minimize exposed skin. Many mosquitoes bite between dusk and dawn so try to stay indoors if possible. Use insect repellents containing DEET in accordance with manufacturer's recommendations.