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Does being cold make you sick?

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Have you ever heard someone say, "Bundle up or you'll get sick"? These pre-cautionary words echo around the world as the first step of prevention against colds and flu when temperatures dip. But does being cold really make you sick? In this lesson, we are going to learn more about how and why it can happen.

In your own words, explain what happens to most viruses when temperatures warm up outside. (Video hint at 1:50)

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