No. Even in areas where mosquitoes do carry the virus, very few mosquitoes are likely infected. Only a small percentage of people who become infected will get severely ill. The Maine Environmental Policy Institute (MEPI) estimates that in areas where West Nile Virus is endemic, approximately one in 1,000 mosquitoes actually carry the virus. The MEPI also estimates that only one in 300 people bitten by a West Nile Virus infected mosquito will show any signs of sickness. Even if you contract the WNV and become ill, most people will only exhibit mild flu-like symptoms. The chances you will become severely ill from any one mosquito bite are therefore small.