Maricopa County in Arizona reported first death this year from West Nile virus (WNV) in an older adult with other health conditions.

Maricopa County in Arizona reported first death this year from West Nile virus (WNV) in an older adult with other health conditions.

Cases of West Nile virus (WNV) are at a record high in Arizona, with 156 infections and 16 deaths reported so far in 2019.

First discovery of St. Louis encephalitis (SLEV) in mosquitoes. SLEV reemerged in California in 2015 after being undetected for 12 years, and this is the first detection in Los Angeles County for the 2019 mosquito season.