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12 December 20, 2021

12 December 20, 2021

Max Weirauch2022-01-25T15:29:26-08:00January 25, 2022|

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West Nile Virus Activity

Indicators Placer County* CA*
Mosquito Samples 145 2755
Dead Birds 8 154
Horses 0 5
Human Cases/Fatal Cases 6/1 102/9

*Updated 11/24/2025

Latest News

  • Placer County confirms first West Nile virus death of season October 6, 2025
  • First Human Case of West Nile Virus Reported in Placer County This Summer August 29, 2025
  • West Nile Virus Positive Mosquitoes Found in West Placer County Agricultural Area June 18, 2025
  • West Nile Virus Mosquitoes Detected In Sheridan July 11, 2024

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