First Mosquito-Borne Virus of 2021 Detected in Michigan Grab the bug spray! Mosquitoes recently collected in three Michigan counties have tested positive for the Jamestown Canyon virus. Get our free mobile app These are the first infected mosquitos collected and tested in the state in 2021 that were found to carry a virus that is transferrable to humans. MDHHS is reminding state residents that the best way to protect themselves against JCV and other mosquito-borne illnesses, including Eastern Equine Encephalitis (EEE) and West Nile virus (WNV), is to prevent mosquito bites from happening. Every summer in Michigan, bites from mosquitoes carry the risk of spreading diseases to people and animals. JCV sickened three Michiganders in 2020. There were also 32 reported cases of WNV and four cases of EEE, resulting in two deaths. One of those who were infected in 2020 and later died from the West Nile virus was WOODtv Reporter Barton Deiters.