BERKELEY (CBS SF) — A person infected with measles who ate at a Berkeley restaurant may have exposed hundreds of fellow diners to the virus.

The adult ate La Mediterranee on College Ave. last Friday between 6:45 and 8 p.m. Health officials say at the time, the person did not have symptoms yet, and was not aware of the infection.

Meanwhile, there’s another case of a person with measles who may have exposed passengers on the BART train.

San Mateo County health officials say the infected person rode a BART train last Friday from the Milbrae Station to Civic Center in San Francisco at about 4:30 p.m.

ALSO READ: Could I Get The Measles As A Vaccinated Adult?

Doctors say the risk of catching measles on a train is low.

But still, people need to be aware and watch for symptoms, especially those who aren’t vaccinated yet.

VACCINATION RATES: All 2014-15 Kindergarten Classes
LATEST CASES:  CA Public Health Tracking