Overview
- Orange County reported a second measles case tied to a Disneyland visit on Jan. 22, with exposure windows at Disneyland Park from 8 a.m. to 4 p.m. and Disney California Adventure from 3 p.m. to closing.
- DC Health said multiple contagious visitors were in Washington, D.C., between Jan. 21 and Feb. 2, including the National March for Life rally on Jan. 23, Reagan National Airport on Jan. 26, Metro lines, Union Station, and Children’s National Hospital.
- San Bernardino County confirmed an unvaccinated visiting minor was infectious at the Ontario Walmart Supercenter on Jan. 29 between noon and 3 p.m., and officials said this case is not connected to the Disneyland exposures.
- Riverside County recorded its first measles case of 2026 in an unvaccinated child with no recent international or out‑of‑state travel, who is recovering at home, officials said.
- The CDC counted 733 U.S. cases across 20 states as of Feb. 5, with 95% in unvaccinated or unknown‑status individuals; officials emphasize two MMR doses, monitoring for symptoms over 7–21 days, and immune globulin for high‑risk contacts.