Mosquitoes in two areas of Weld County have tested positive for West Nile virus, though no human cases have yet been reported in the county.

Mosquitoes carrying West Nile virus have been detected in Anoka and Carver counties, but officials say people shouldn’t be alarmed. “We have detected West Nile virus … but not to the point

West Nile causes no symptoms in most people, and mild illness in others. It can also cause neurological disease in rare cases. No human cases of the virus have been reported locally this year.