Toronto's public health department is warning that people who recently travelled through Pearson International Airport may have been exposed to measles.

Passengers on Emirates Airlines Flight EK241 that day and anyone in Terminal 1 between approximately 10 a.m. and 1:30 p.m. may have been exposed to the virus, according to the release.

TPH says the measles virus can stay in the air or on surfaces for up to two hours.

"Measles is a highly contagious virus that spreads through the air when an infected person breathes, coughs, sneezes or talks," the department said.

"People can become infected if they breathe contaminated air or touch an infected surface, then touch their eyes, nose or mouth."

Symptoms may include fever, runny rose, cough, red eyes, a red rash that begins on the face and spreads down the body, as well as small blue-white spots (Koplik spots) that can appear on the inside of the mouth and throat.

TPH advised those who believe they may have been exposed to the virus on the flight or in Terminal 1 to monitor for symptoms until Dec. 29.

AHS said the person is believed to have been infected outside of Canada, but since arriving in Calgary, has visited a large grocery store and the Alberta Children's Hospital.

Anyone who were at the following locations on the specified dates and during the specified times may have been exposed to measles, AHS said in a Dec. 19 health advisory.

Specifically, travellers who flew with Turkish Airlines on Dec. 4 either from Kabul to Istanbul via Flight TK707 or from Istanbul to Toronto via Flight TK17, or both, may have been exposed to measles.

In addition, anyone in Terminal 1 of Pearson Airport approximately from 6:45 p.m. to 10:30 p.m. on Dec. 4 may have been exposed, PPH said.