The San Bernardino County Department of Public Health has confirmed a positive case of measles, the first confirmed case in the county since 2023. The case involves an unvaccinated minor who was visiting California from another state. This case is unrelated to the recently reported Disneyland exposure.
During the infectious period of Jan. 26 through Feb. 3, 2026, the individual visited the following public location:
- Walmart Supercenter, 1333 N. Mountain Ave., Ontario — Jan. 29, 2026, between noon and 3 p.m.
Individuals identified through contact investigation may receive a call from County Public Health.