The Montgomery County Office of Public Health is currently investigating a confirmed case of measles in a child in the county who is unvaccinated.

Investigators are completing contact tracing in coordination with the identified healthcare systems below and the child’s guardian. Identified individuals will be contacted and notified of potential exposure to measles and assess each individual’s vaccination status and risk for infection.

The measles virus can remain infectious in the air and on surfaces for up to two hours after an infected person leaves the area.

The following locations were visited by the child with a confirmed case of measles during their infectious period. People who were at any of these locations during the identified time periods may have been exposed.

July 20, 2023 from 12:30 p.m. to 6:30 p.m.
Bryn Mawr Hospital Emergency Room
130 S. Bryn Mawr Ave., Bryn Mawr, PA 19010

July 20, 2023 from 5:15 p.m. to 8:15 p.m.
Costco Wholesale
740 Upper State Road, North Wales, PA 19454

July 21, 2023 from 5:30 p.m. to 9:45 p.m.
Children’s Hospital of Philadelphia Emergency Department
3401 Civic Center Blvd., Philadelphia, PA 19104

July 22, 2023 from 5 p.m. to 8 p.m.
Walmart Supercenter
1515 Bethlehem Pike, Hatfield, PA 19440

July 23, 2023 from 9:15 a.m. to 5:45 p.m.
Children’s Hospital of Philadelphia Middleman Family Pavilion Emergency Department
550 S. Goddard Blvd., King of Prussia, PA 19406

You can learn more about what you should do if you feel you were exposed here.