Health officials in the East Bay say a person who visited several stores in the Walnut Creek area ahead of Christmas has tested positive for measles. According to Contra Costa Health, the person was contagious in public between Dec. 17 and 24, before the case was identified. Tap the link in our bio for a full list of retail locations, where people may have been exposed to the highly contagious respiratory virus. #measles #eastbay #outbreak #bayarea