The Department of Public Health this morning issued a notification after contagious measles patient visited several spots in San Francisco and rode on Caltrain in the morning of April 1 and afternoon/evening of April 3.

There is no so-called “outbreak,” and San Francisco, by and large, benefits from a high level of vaccination. “However, unvaccinated children, unvaccinated adults born in 1957 or later, and those with severely weakened immune systems are advised to review the list of locations below,” reads the notice from the health department.

Symptoms may develop between seven and 21 days after exposure.

The locations in question:

Monday April 1:

6.56 – 8:13 a.m. | Caltrain train 319 northbound. First car of train (car 116).

8:45 – 9:15 a.m. | Caltrain train 232 southbound. Last car of train (car 116).

8:15 – 9:45 a.m. | SF Muni Bus #47

8:00 – 10:00 a.m. | Hayes Valley Bakeworks at 525 Golden Gate Avenue

8:30 a.m. – 7:00 p.m. | Federal Building at 450 Golden Gate Ave

Tuesday April 2:

8:00 a.m. – 7:30 p.m. | Federal Building at 450 Golden Gate Ave

8:00 – 9:30 a.m. | Johnny Doughnuts at 392 Fulton St

8:00 – 10:00 a.m. | Hayes Valley Bakeworks at 525 Golden Gate Avenue

6:30 – 8:00 p.m. | Double Decker Restaurant at 465 Grove St

Wednesday April 3:

8:00 – 10:00 a.m. | Hayes Valley Bakeworks at 525 Golden Gate Avenue

8:30 a.m. – 3:30 p.m. | Federal Building at 450 Golden Gate Ave

3:00 – 4:30 p.m. | Caltrain station, 700 4th Street

3:34 p.m. – 5:10 p.m. | Caltrain train 258 southbound. Second car from the back (car 3861).

5:32 p.m. – 6:15 p.m. | Caltrain train 279 northbound. Second car from the front (car 3861).

“This single case does not have any known link to any other California cases,” continues the statement from the Department of Public Health. “It is not known how the person, who is a Santa Clara County resident, was infected with measles. San Francisco and Santa Clara public health departments are working together to ensure the safety of the person with measles and residents and visitors of both counties. The individual was not hospitalized and is recovering at home. Further information will not be released to protect medical privacy.”