This undated image made available by the Centers for Disease Control and Prevention on Feb. 4, 2015, shows an electron microscope image of a measles virus particle, center. The Canadian Press/AP-Cynthia Goldsmith/Centers for Disease Control and Prevention via AP
The Quebec government says thousands of people might have been exposed to measles at a shopping mall north of Montreal earlier this month, as an outbreak of the highly contagious disease continues to grow.
Officials say the current outbreak that began last month has now reached 11 cases.
