-- A pool of West Nile Virus-positive mosquitoes has been located in both Portage Township and Penn Township according to the St. Joseph County Department of Health. The health department has provided a list of precautions to protect you and your family. Tips to protect yourself:Avoid being outdoors during prime mosquito biting times, which are dusk and dawn, when possible. Wear a hat, long sleeves, and long pants to cover exposed skin in places where mosquitoes are especially active, such as wooded areas. Make sure all windows and doors have screens and that all screens are in good condition.