There were three cases of measles in King County last year. The new case was confirmed on Wednesday. The infant is suspected to have been exposed to measles during recent travel a

If you think you’ve been exposed to measles, do not show up at a clinic or hospital without calling first, Public Health — Seattle & King County said. To avoid possibly spreading measles, limit contact with others and wear a well-fitting mask if you need to go to a health care facility, the department said.

Public health officials have listed several locations in Seattle and the Eastside where the infected infant was present while contagious.

Measles is extremely infectious, and health officials have identified several potential exposure locations across the county.