(AP) - Officials in Northern California are warning people who traveled on Bay Area Rapid Transit that they may have been exposed to measles.
Contra Costa County public health officials say someone was diagnosed with the disease after using BART to travel between Lafayette and San Francisco during the morning and evening commutes Feb. 4 through Feb. 6.
Officials said Wednesday that the patient also dined at E&O Kitchen and Bar on Feb. 4.
Health officials say the risk of vaccinated commuters contracting measles is "highly unlikely." People born before 1957 are considered immune.
More than 100 people in California and others in several states and Mexico have been infected with measles since an outbreak traced to Disneyland was first reported in December.
It's not known how the commuter contracted the disease.