 Health officials say the West Nile virus has been detected in mosquitoes in Grand Forks. While only a few mosquitoes have tested positive for the virus, locals are being asked to take precautions. Experts say wearing bug spray and long clothing and staying indoors at dusk and dawn reduces the risk of mosquito bites. The West Nile virus causes fever, headache, body aches, a rash, and in rare cases can be deadly.