What to do if you’ve been exposed to measles
CNN • • general
Key Points:
- The United States reported a record number of measles cases in 2025, with 171 cases already reported in the first two weeks of 2026, nearly matching the average annual total since measles was declared eliminated.
- Major outbreaks are concentrated in upstate South Carolina and along the Utah-Arizona border, but the virus is spreading broadly, including exposures at schools, airports, and public transportation, complicating tracking and containment efforts.
- The highly contagious measles virus can be effectively prevented with the MMR vaccine, which offers 93% protection after one dose and 97% after two doses; vaccination is recommended for children and adults, with accelerated schedules during outbreaks.
- Public health officials urge those exposed to measles
