Health officials in King County have confirmed two cases of measles in July and are warning residents about possible exposure on Mercer Island.

The two people, who are siblings – one an adult and the second a child – were visiting from out of state and visited several locations on Mercer Island.

People who visited Mercerdale Park from 6 p.m. to 10 p.m. on July 9 and the QFC on S.E. 28th Street on July 10 from 7 to 10 p.m. and on July 15 from 1 to 4 p.m. could have been exposed.

Other areas where the pair visited include Ken’s Market in Seattle, Spud Fish and Chips in Kirkland and the QFC at Parkplace Center in Kirkland.

Health officials say the risk to the general public is low because most people in the area have immunity to measles because of vaccinations, and that outdoor exposure creates an even lower risk, anyone who visited those areas in those times should make sure they have been vaccinated and contact their health care provider if they develop a fever or unexplained rash. Health officials say those who were exposed are most likely to become sick between July 16 and Aug. 8.

Measles is a highly contagious and potentially severe disease which causes a rash, fever, cough and red, watery eyes. It’s mainly spread through the air after a person with measles coughs or sneezes.

To learn more, visit the King County Health Services website.