Mosquitoes infected with West Nile virus have been discovered in Orange County, and officials are warning residents to take precautions when heading outdoors.

Public health officials in Solano County confirmed a positive West Nile Virus detection in mosquitoes collected from near the Birds Landing area in the Sacramento delta.

SALT LAKE CITY — 11 mosquito pools in Davis County tested positive for West Nile virus, according to the mosquito abatement district’s Facebook. According to the Centers for Disease Control, cases mostly occur during summer and autumn, which are the mosquito seasons.