You may have been exposed to measles, which is a highly contagious viral disease. The Maine Centers for Disease Control have issued a warning to the general public about measles exposure, according to WMTW. The report says an infected Massachusetts resident with a confirmed case of measles went to two different Maine businesses on March 27th -- the Skin Clinic in Falmouth and Maine Centers for Healthcare Endoscopy in Westbrook.

People who had appointments at the two places are being contacted as per the Maine CDC via WMTW.
WMTW says:

Even after an infected person leaves a location, the virus remains alive for up to two hours on surfaces and in the air.

Call your doctor if you think you have been exposed to measles.