Health ❯ Epidemiology ❯ Disease Outbreaks

Measles Outbreaks

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Pennsylvania Reports Fifth Measles Death as Cases Top 900

The state says an unvaccinated Lancaster County resident has died and officials are expanding vaccination clinics to try to stop spread.

Measles Cases in Southwestern Wisconsin Reach 110 Concentrated in Two Counties

Measles Resurgence Escalates With Hospital Exposures and Growing Local Clusters

U.S. Measles Cases Hit 35-Year High as 2026 Total Tops 2025

Oral Antiviral Candidate Stops Measles-Like Virus Transmission in Ferret Study

U.S. Measles Cases Surpass Last Year’s Total and Put Elimination Status at Risk

Maricopa County Reports Seven New Measles Cases and Names Two Public Exposure Sites

Five Measles Cases Tied to Out‑of‑State Travel Prompt Exposure Alert in Maryland

Health Agencies Warn Travelers of Measles Exposure at Toronto and Philadelphia Airports

Georgia Confirms 3 Measles Cases in Unvaccinated Metro Atlanta Family

Travel-Linked Measles Cases Prompt Exposure Alerts in Maryland and Rhode Island

California Measles Count Hits 39 as San Francisco Reports First Case Since 2019

Cook County Warns of Measles Exposures at O'Hare and North Suburban Sites

Washtenaw County Confirms Seventh Measles Case, Flags ER Exposure

Measles Outbreaks Escalate in London and California as Officials Move to Shield Schools and Boost Shots

U.S. Measles Count Hits 1,136 as Massachusetts Reports Two Cases

Madison Confirms Hotel-Linked Measles Exposure as Officials Seek Contacts

U.S. Measles Cases Reach 910 Across 24 Jurisdictions as New Clusters Emerge

California Flags Disneyland-Linked Measles Exposures as Officials Track New Cases

South Carolina Measles Outbreak Hits 646 As CDC Deputy Downplays Loss of U.S. Elimination Status