Contra Costa County officials said Wednesday that the patient, an employee at LinkedIn, rode the train to and from work Feb. 4 through Feb. 6. She also dined at E&O Kitchen and Bar.
The state Department of Public Health has no record of the number of San Francisco residents who have been vaccinated against measles, especially with the growing number of anti-vaxers in the region and country.
Health officials have warned that those without vaccinations who came in contact with the infected BART commuter are at “high risk” of contracting the disease, while the chance of vaccinated people contracting the disease is “highly unlikely.”
"Although the risk of contracting measles by being exposed on BART is low, Bay Area residents should be aware of the situation," the county public health department said in a statement.
Officials have urged people displaying symptoms of the virus, including high fever, runny nose, coughing and watery red eyes, to seek medical attention immediately.
California health officials have confirmed dozens of cases in the state since the outbreak began when an infected traveler visited Disneyland in December. Over 121 cases in 17 states have been reported in the US.
The outbreak has renewed a debate over the anti-vaccination movement fueled by debunked research that links vaccines to autism. Some parents also refuse to vaccinate their children for religious reasons.