West Nile Virus Cases Detected in Colorado, Indiana; Mosquitoes Positive in California, Ohio

West Nile virus activity has been confirmed across several U.S. states this summer, with human cases and infected mosquitoes reported in Colorado, Indiana, and California, as well as positive mosquito pools in Ohio. Colorado has identified its first human cases of the season in Adams County and detected infected mosquitoes in multiple counties along the Front Range, urging residents to take precautions such as wearing long sleeves and using repellents. Indiana reported its first human case in Vanderburgh County, with mosquito samples testing positive in 15 counties, prompting health officials to anticipate more cases and recommend mosquito bite prevention measures. In California's Orange County, West Nile virus was found in mosquitoes and a dead bird in Anaheim and Garden Grove, though no human cases have yet been confirmed, leading to increased mosquito control efforts. Ohio's Kent City Health Department confirmed West Nile virus in several mosquito pools, with no human cases reported so far, and is intensifying monitoring and control activities. Health authorities across these regions emphasize draining standing water, using EPA-approved repellents, and avoiding peak mosquito activity times to reduce infection risk.