Health ❯ Diseases ❯ Infectious Diseases ❯ Vector-borne Diseases

West Nile Virus

West Nile Cases Climb in New York City as Mosquito Tests Exceed 1,600

Expanded trapping with targeted spraying aims to map hotspots to reduce transmission.

U.S. Sees Widespread West Nile Surge as EEE Detected in Massachusetts

New York City Confirms First Human West Nile Case as Mosquito Positives Surge

Early, Widespread Rise in West Nile Detected as Local Agencies Intensify Control

NYC Sees Large Rise in West Nile–Positive Mosquito Pools and Plans Targeted Spraying

Arizona Tops U.S. in West Nile Cases With Maricopa’s Fifth Death

Early West Nile Surge Triggers Alerts in Andalusia and New U.S. Neuroinvasive Cases

Early West Nile Season Brings Spike in Infected Mosquitoes Nationwide

Texas Confirms First Human West Nile Case of 2026

Milwaukee County Confirms First West Nile Case of 2025 in Bayside

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

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

Fifth West Nile Death Reported in Lazio as Outbreak Intensifies

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

Italy Reports Eighth West Nile Fatality as Outbreak Spreads Beyond Lazio

West Nile Virus Kills Five in Latium Hotspot as Cases Exceed 40

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

Seven New West Nile Infections Push Lazio Total to 28

First Local West Nile Death Reported in Latina Province as Six Others Confirmed