The H1N1 strain of the swine flu is back, here's what you need to know

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In 2009 we were hit with the H1N1 strain of the swine flu. It triggered widespread vaccinations. More than 120 people died in Ontario. And now it’s back. Dr. Bryna Warshawsky, a medical director with Public Health Ontario, tells us what we need to know about this year's strain.

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