Health ❯ Public Health ❯ Infectious Diseases ❯ Vector-Borne Diseases

West Nile Virus

Second West Nile Detection Confirmed in Hays County Mosquito Trap

State health officials confirmed a Nov. 4 Wimberley-area sample, prompting renewed county warnings on mosquito bite prevention.

L.A. County Confirms First West Nile Virus Death of 2025

Roseville Man's Death Is Placer County's First West Nile Fatality of 2025, Fifth in California

Two More West Nile Cases in Massachusetts as 47 Communities Reach High Risk

NY Probes Possible Local Chikungunya Case as West Nile Activity Rises in Northeast and Midwest

Albany County Confirms First West Nile Virus Case Since 2018

West Nile Season Intensifies With First LA Cases and Deaths Reported in Illinois and Michigan

Suspect Detained After Gunfire Hits Illinois Senator’s Home in Shorewood

U.S. West Nile Cases Climb to 771 as 2025 Season Runs 40% Above Normal

First Human West Nile Cases of the Season Confirmed in Connecticut, Long Island and Trumbull County

First Human West Nile Cases Confirmed in Massachusetts and Delaware County as Mosquito Positives Surge

New Jersey Confirms Two Human West Nile Cases as Northeast Activity Intensifies

West Nile Activity Intensifies With 2 Deaths in Minnesota and New Signals in New York, Maryland and Indiana

West Nile Virus Activity Intensifies With NYC’s First Human Cases and Maryland’s First of the Year

Chicago Elevates West Nile Risk to High After First Human Cases Confirmed

Austin Public Health Investigates First Suspected West Nile Virus Case in Travis County

West Nile Virus Detected in San Antonio Mosquitoes; Denver Confirms First Human Case

Wisconsin, Texas and Toronto Report First West Nile Virus Human Cases of 2025

Early West Nile Virus Surge Drives Third Illinois Human Case, Elevated County Risk

West Nile Virus Detected in Mosquitoes in Philadelphia and Four NYC Boroughs