Measles cases in Ontario are higher than we’ve seen in a decade, and we’re only three months into the year. Measles is one of the world’s most contagious viruses that can, in some cases, be deadly. While the virus has been effectively eliminated in Canada since 1998, rates of infection and hospitalization in Southern Ontario are growing, along with cases across Canada.

But this is a vaccine-preventable disease. So why is it suddenly re-emerging?

Today, Globe health reporter Kelly Grant is here to explain why we’re seeing this surge in measles cases, and the measures we can take to best protect ourselves – and others – from getting sick.

Questions? Comments? Ideas? Email us at thedecibel@globeandmail.com.