Saskatchewan health officials issued a public advisory Friday after an infant with measles arrived in the country by plane early this month.
The baby's family flew from the Philippines to Vancouver on Jan. 2 and then to Calgary and Regina on Jan. 7.
Passengers on the same flights as the family may have been exposed to measles, which is highly contagious and easily transmitted through the air, the provincial health ministry said in the advisory.
Symptoms of measles include high fever, cough and runny nose, followed by a rash that starts on the face before spreading to the rest of the body. It can lead to serious complications and even death.
The infant was not immunized, officials said.
Measles is extremely rare in Canada. It was considered "eliminated" in 2002, the Public Health Agency says, but cases are still "imported."