Quebec public health issued a warning of possible measles exposure at both Montreal‑Trudeau International Airport and Sainte‑Justine Hospital after a child who was contagious moved through the airport on Oct 9 and attended the hospital emergency department on Oct 10.
The child had contracted measles while traveling and sought medical care, leading officials to alert the public. Because measles is a highly contagious viral disease, Quebec health authorities regularly monitor and notify about locations where exposure may have occurred.