Larimer and Weld counties, Colorado

Kersey

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    • Greeley

      Weld County confirms first West Nile case of 2026

      Weld County has confirmed its first West Nile virus case of the 2026 mosquito season, a month later than last year’s first case. Mosquitoes in all three county sentinel zones have tested positive, prompting health officials to urge precautions.