Video

H1N1 flu in Canada: outbreak or pandemic?

The county is watching the spread of H1N1: It's the predominant flu in Canada this winter.

Johanna Wagstaffe answers your questions in Science Smart, a weekly video column

An outbreak is local, like in a town. A pandemic is worldwide. 2:24

With theflu season well-underway, many questions are coming in about the difference between an outbreak and a pandemic.

But what factors characterize an influenza pandemic rather than a localized outbreak, and how does Health Canada monitors these changes?

In this week's Science Smart video column, the CBC's Johanna Wagstaffe tells us how a flu is tracked and when and how it's labelled as dangerous.

If you have a science question you'd like answered, send Johanna a tweet (@Jwagstaffe) or an email: johanna.wagstaffe@cbc.ca.

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