Dead Bird Tests Positive For West Nile Virus In Menlo ParkAccording to the San Mateo County Mosquito and Vector Control District, the bird is the first indication of the virus this year in the county.
San Mateo County Reports Its First Cases Of West Nile Virus This YearTwo dead birds found in San Mateo have tested positive for West Nile virus, the San Mateo County Mosquito and Vector Control District announced on Tuesday.

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