Genomic analysis suggests that the outbreak probably began in December or January, but a shortage of data is hampering ...

The Contra Costa Mosquito and Vector Control District said Friday an American crow was picked up with the virus April 9. It’s ...

triggering local officials to request residents to practice mosquito mitigation as the insects this year threaten another ...

The biggest West Nile virus outbreak in the United States occurred right here in Arizona in the summer of 2021. Pima, Pinal ...

A dead bird in Concord has tested positive for West Nile virus. The Contra Costa Mosquito and Vector Control District said ...