West Nile, mosquito
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The city reported that it had discovered its first West Nile-positive mosquito for the 2025 season in early July. The Daily Camera reported the news, saying that while West Nile virus season was starting early in Colorado's Front Range, experts weren't certain that this would translate into a heavy season for infections.
Colorado public health officials shared Tuesday that the first human cases of West Nile virus of 2025 had been confirmed in two Adams County residents.
Two people in Adams County have tested positive for West Nile Virus, which has seen a significant increase in mosquitoes in the state. Dr. Lindsey Fish, Internal Medicine with Urgent Care at Denver Health,
Most West Nile cases in Colorado happen between July and September, though mosquitoes can live until the first snow or hard freeze.