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Measles Returns: First Case in San Bernardino County Since 2023
9 Feb
Summary
- An unvaccinated minor visiting from another state was infectious during a recent visit.
- The minor visited an Ontario Walmart on January 29, 2026, between noon and 3 p.m.
- This case is separate from recent Disneyland-related measles cases.

San Bernardino County has reported its first measles case since 2023. Health officials confirmed that an unvaccinated minor, who was visiting California from another state, was infectious during a visit to a Walmart Supercenter in Ontario. The minor visited the store located at 1333 Mountain Avenue on January 29, 2026, between noon and 3 p.m.
This specific incident is not connected to recent measles cases linked to Disneyland visitors. It brings the total number of confirmed cases in Southern California to at least seven, with Orange and Los Angeles counties each reporting three cases.
County health officials stressed the importance of vaccines as the primary defense against measles. They noted that the virus is highly contagious and spreads through the air. Symptoms include fever, cough, red eyes, and a runny nose, followed by a rash. Measles can lead to serious health issues, including pneumonia and, in rare instances, death.
Individuals who were at the identified Walmart location during the exposure window and are unvaccinated, immunocompromised, or pregnant are at risk. They are urged to contact their healthcare provider immediately if they feel ill or suspect exposure.




