Where was the recent measles exposure in San Bernardino County?

The measles exposure occurred at the Walmart Supercenter located at 1333 Mountain Avenue in Ontario on January 29, 2026.

Is the new measles case connected to Disneyland cases?

No, health officials stated that this incident is not connected to recent measles cases involving Disneyland visitors.

What are the risks associated with measles?

Measles can lead to serious health complications such as ear infections, lung infections, diarrhea, and in rare cases, brain swelling or death.

Home / Health / Measles Returns: First Case in San Bernardino County Since 2023

Measles Returns: First Case in San Bernardino County Since 2023

9 Feb

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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.

Measles Returns: First Case in San Bernardino County Since 2023

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.