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Health.com: 20 Surprising Ways to Prevent Colds and Flu

Call It a Day

"My strategy is to double down on trying to get enough sleep, even if it's just a power nap on a plane. Research shows that our bodies need seven to eight hours of sleep in order to stimulate an immune response from our 'natural killer cells,' which attack viruses. Sleep is my most reliable defense against infection."
—David Katz, MD, founder of the Yale University Prevention Research Center and author of Disease-Proof: The Remarkable Truth About What Makes Us Well

(Credit: Getty Images)
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The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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