First positive West Nile virus samples in Sacramento, Yolo this year confirmed - Sacramento Bee

First positive West Nile virus samples in Sacramento, Yolo this year confirmed Sacramento Bee By Bill Lindelof The first positive samples this year of West Nile virus in mosquitoes in Sacramento and Yolo counties have been confirmed - signaling what may be a very busy mosquito season. The five positive mosquito samples and two new dead birds ...

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