San Bernardino County Confirms Year's First Measles Case

Possible exposure occurred at local Walmart, officials warn residents to check vaccination status.

Published on Feb. 6, 2026

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San Bernardino County's Department of Public Health has announced the first confirmed case of measles in the county since 2023. The case involves an unvaccinated youth visiting from another state, and possible exposure may have occurred at a Walmart Supercenter in Ontario on January 29th.

Why it matters

Measles outbreaks have been on the rise in recent years, with over 700 confirmed cases nationwide so far in 2026. While most cases do not result in hospitalization, measles can lead to serious health complications, especially for vulnerable populations like young children and those with weakened immune systems.

The details

According to the county's public health department, the measles case is not related to recent exposures reported at Los Angeles International Airport and Disneyland Resort. Officials are urging residents who may have been at the Ontario Walmart between noon and 3 p.m. on January 29th to confirm their vaccination status and watch for symptoms, which can develop 7-21 days after exposure.

  • The confirmed measles case is the first in San Bernardino County since 2023.
  • Possible exposure occurred between noon and 3 p.m. on January 29, 2026 at a Walmart Supercenter in Ontario.

The players

San Bernardino County Department of Public Health

The local public health department that confirmed the measles case and is warning residents of potential exposure.

Dr. Sharon Wang

San Bernardino County's health officer, who stated that vaccines are the best defense against infectious diseases.

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What they’re saying

“Vaccines are our best defense against infectious diseases, protecting both individuals and the wider community.”

— Dr. Sharon Wang, San Bernardino County Health Officer (sbsun.com)

What’s next

The county's public health department will be contacting those who may have been exposed to the measles case.

The takeaway

This measles case highlights the importance of vaccination, especially as outbreaks continue to occur across the country. Residents should check their vaccination status and watch for symptoms if they may have been exposed at the Ontario Walmart.