Do you need another MMR vaccine amid outbreaks? Here’s what you need to know – CTV
April 30, 2025
With measles cases on the rise in Canada, many people are asking whether they should or can get a third or “booster” dose of the measles-containing vaccine. Here’s what you need to know about vaccine recommendations, recent outbreaks, side effects, and more.
Should I get a third dose of the measles vaccine? How many MMR shots do you need in a lifetime?
Health officials say a third dose is not recommended at this time. Health Canada says for those who’ve never had measles, one dose provides up to 95 per cent protection. Two doses are nearly 100 per cent effective. If you’ve already received two doses, you’re considered fully protected.
How do I know if I had the measles vaccine?
Canadians will have to ask their doctor for records if they don’t have their own paperwork. Depending on when they were born, they are more or less likely to have had one or both doses of vaccine. You may also be able to request a blood test to confirm.
