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About Measles| Measles Health Advisories| Testing Positive For Measles| Resources for Health Professionals
Last Updated: August 4, 2026
Measles is extremely contagious. Measles is a virus that spreads easily through the air when someone who has measles coughs, sneezes, yells, sings, and breathes. You can get measles just by passing through a room or location where a person who is infected was up to 2 hours before. The person who is infected does not still need to be there to put you at risk of disease. The best protection against measles is to ensure you are up to date with your immunizations.
Measles cases are increasing globally, with numerous countries and travel destinations reporting outbreaks including the United States and Europe. Cases have been identified recently in several Canadian provinces, including Alberta.
For the most up-to-date information on current and ongoing public health advisories, sign up for email notifications, visit Alberta’s public health advisories page and follow Alberta Health on X.
If you have measles, you can spread it before you show any symptoms. Measles can spread starting four days before the rash appears and ending four days after the rash appeared.
For all health professionals and AHS staff visit Measles Information for Health Professionals.