Please wait http://www.hotel-tychon.be/gastronomie-2/ programs cheap libitol material West Nile is most commonly transmitted to humans by the bite of an infected mosquito, according to the Framingham Board of Health. The mosquitoes that carry this virus are common throughout the state, and are found in urban as well as more rural areas. While West Nile can infect people of all ages, people over the age of 50 are at higher risk for severe infection.