Also known as: runny nose
The U.S. recorded 2,280 measles cases in 2025, the highest since 1991, with 982 cases already confirmed in early 2026. North London faces an outbreak with 34 children infected in Enfield, while Philadelphia issued an exposure alert for the international airport.
A measles exposure occurred on February 18 at Nemours Children's Hospital emergency department in Delaware. State health officials are conducting contact tracing and urging unvaccinated exposed individuals to receive MMR vaccine within 72 hours.
Measles cases are rising across multiple states, with over 40 cases at a Florida college and 18 cases in North Carolina since December. Federal health officials are urging vaccination as the U.S. recorded 2,280 cases in 2025.
