AHS has put non-immunized Calgarians on high alert, after receiving notice of a confirmed measles case over the weekend.
The agency says a seven-year-old girl in Calgary has tested positive for the infectious disease.
The girl became ill after returning from India with her parents on a British Airways flight from London to Calgary, between Jan. 9-10, 2018.
She also visited a Real Canadian Superstore on Southport Road S.W. on the evening of Jan. 19 while contagious.
The agency is urging Calgarians who may have been exposed, to monitor for symptoms of the measles if they have not been immunized.