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Keep Moving

Exercise can keep you from getting sick by stimulating the immune cells that target cold infections, Dr. Fryhofer explains. A University of South Carolina study found that people who walked or did other moderate activity for 30 minutes most days averaged one cold per year, while less-active folks reported more than four colds per year.

Just don't overdo it: Heavy exertion—like marathon training—may increase your risk of catching seasonal bugs, perhaps because it can stress the body's systems, allowing viruses to gain a foothold.

(Getty Images)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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