MILWAUKEE (CBS 58) -- The first human case of West Nile virus (WNV) has been reported in northern Milwaukee County, according to the North Shore Health Department (NSHD). 

West Nile virus is spread to people through the bite of an infected mosquito; it is not transmitted from person to person. Mosquitoes become infected by feeding on infected birds.

The health department says it's important for people to stay vigilant about prevent mosquito bites throughout the fall until mosquitos are no longer active -- which is typically after a hard frost. 

Most people who are infected with the virus do not become ill.

The best way to avoid illnesses spread by mosquitoes is to reduce exposure and eliminate mosquito breeding sites. The North Shore Health Department recommends the following:

• Avoid Mosquito Bites
• Apply insect repellent containing DEET, picaridin, oil of lemon eucalyptus, or IR3535 to exposed skin and clothing.
• Prior to going outdoors, treat clothing with permethrin; do not apply permethrin directly to skin.
• Consider rescheduling outdoor activities during evening or early morning hours, when mosquitoes that spread WNV are most active
• Wear loose-fitting long sleeves and long pants to help prevent mosquito bites. 

Mosquito-Proof Your Home:

• Prevent mosquitoes from breeding around your home by eliminating stagnant water.o Empty standing water from tin cans, plastic containers, flowerpots, discarded tires, roof gutters, and downspouts.
  • Turn over wheelbarrows, kiddie pools, buckets, and small boats such as canoes and kayaks when not in use
  • Change the water in birdbaths and pet dishes at least every three days.
  • Clean and chlorinate swimming pools, outdoor saunas, and hot tubs; drain water from pool covers.
  • Make sure window and door screens are intact and tightly fitted to keep mosquitoes out.
  • Trim or mow tall grass, weeds, and vines, since mosquitoes rest in shaded areas during hot daylight hours