Open this photo in gallery: Public-health nurse Lauri Bidinot demonstrates how to give a measles shot to a young girl at Southwestern Public Health in St. Thomas, Ont., on March 4.Geoff Robins/The Canadian Press Since last October, Canada has experienced a multijurisdictional measles outbreak. And while cases have slowed down in places such as Quebec, where the province recently declared an end to its outbreak, others haven’t been so lucky. As of April 24, Ontario’s ballooning measles outbreak surpassed 1,000 cases. The province has 10 times more cases than it experienced during the entire decade of 2013-23. Meanwhile, Alberta confirmed 137 cases. Measles is among the world’s most contagious infectious diseases, capable of spreading when an infected person breathes, talks, coughs or sneezes. For people who lack immunity – obtained either through vaccination or prior infection – at least 90 per cent of those exposed will become infected. Measles is re-emerging in Ontario. Here’s what you need to know to protect you and your family On Friday, May 2 at 1 p.m. ET, Globe health reporters Kristy Kirkup and Alanna Smith will answer reader questions on Canada’s measles outbreaks. Globe and Mail subscribers can ask a question or leave a comment, but registered non-subscribers can still view the questions and responses. To submit a question, fill out the form below or scroll down to the comments section of this article. Are there any signs that cases are slowing down? How is it spreading? What can you do as a parent to keep your child safe? Why is measles so dangerous? Submit your questions now.