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Francis Delapaz
Communications Officer
(909) 520-5103
Francis.Delapaz@dph.sbcounty.gov
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FOR IMMEDIATE RELEASE
February 6, 2026
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First confirmed measles case in San Bernardino County |
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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:
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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.
People who were at the above location during the identified timeframe may be at risk of developing measles, especially if unvaccinated, immunocompromised or pregnant. Measles is a highly contagious virus that spreads through the air when an infected person breathes, talks, coughs or sneezes. Symptoms typically develop seven to 21 days after exposure and often begin with fever, cough, runny nose and red eyes. Within a few days, a red, blotchy rash appears, usually starting on the face and spreading downward to the rest of the body. Individuals with measles can be contagious four days before the onset of rash and four days after.
Measles is not just a rash and fever. Measles can lead to serious health complications, including ear infections, lung infections, diarrhea, and in rare cases, brain swelling or death. The best protection against measles is vaccination.
“Vaccines are our best defense against infectious diseases, protecting both individuals and the wider community,” stated Dr. Sharon Wang, San Bernardino County Health Officer. “Staying healthy and staying up to date with vaccinations is a key step in safeguarding public health and saving lives.”
If you feel ill or believe you may have been exposed, it is recommended that you stay home and contact your healthcare provider immediately. Before visiting a healthcare facility, call ahead so that measures can be taken to prevent the spread of measles. Wearing a mask when seeking care can also help reduce transmission.
Children should receive two doses of the measles, mumps and rubella (MMR) vaccine, with the first dose given at 12 to 15 months of age and the second dose at 4 through 6 years of age. Children over 6 months but under 12 months may receive an early dose if traveling to areas with increased measles activity. Teens and adults who do not have documented MMR vaccinations should also get vaccinated.
If you’re unsure of your vaccination status, you can check out CA Digital Vaccine Record (DVR) or ask your healthcare provider. If no records exist, getting vaccinated is highly recommended.
Clinician guidance: Health care providers in San Bernardino County should report suspected measles cases immediately to the Communicable Disease Section at 1-800-722-4794, Monday through Friday from 8 a.m. to 5 p.m. or 1-800-472-2376 after hours.
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