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Disease Surveillance

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West Nile Activity Surges in U.S. Cities as Mosquito Positives and Human Cases Rise

Unusually warm weather has increased mosquito populations in multiple U.S. regions.

West Nile Virus Surges With New Human Cases and Positive Mosquito Traps Across U.S. Counties

Massachusetts Confirms Two Human West Nile Cases as Mosquito Positives Rise

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

CDC Modeling Shows COVID Infections Rising in All 50 States

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

Wisconsin Confirms Two New Measles Cases in Iowa and Lafayette Counties

Gulf Coast States Report Spike in Deadly Vibrio Infections

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

Bourbon Virus Confirmed in New York After Long Island Patient’s Case

West Nile Detections Surge Across North America as New Human Cases Appear

All Four Dengue Serotypes Detected Concurrently in Eight Indian States

Andhra Pradesh Reports 10 New COVID-19 Cases, Tally Reaches 49

Venezuela Confirms Three Hantavirus Deaths as Two More Suspected Cases Are Investigated

Early Multi-State Surge in West Nile Brings First Los Angeles Human Case

Monsoon Flooding Fuels Multi‑Disease Surge, Doctors Urge Testing and Prevention

Ebola Outbreak in DR Congo Surges as Health Response Strains

Early West Nile Season Brings Spike in Infected Mosquitoes Nationwide

Third Child Dies as Chandipura Virus Cluster Expands in Gujarat