Currently, West Nile virus positive mosquito samples and positive dead birds are not being detected. As mosquito season continues to wind down and the weather becomes cooler we expect to see lest West Nile virus activity in the county.

IndicatorsPlacer County*CA*
Human Cases/Fatal Cases2/0184/8
Dead Birds2341
Mosquito Samples582,628
Sentinel Chickens0143
Horses020

*Placer County results as of 12/18/2020; CA results as of 12/18/2020.