Article: How to lift immune system, spirits // Give yourself a boost

Our immune systems are a bit like cars: When they're new, they're about as good as they're going to get. Then life happens. We eat on the go, stay up too late, don't exercise, lead stressful lives and struggle with the blues.

Toss in aging and a few genetic predispositions and this perfect system works a little less perfectly. That makes us vulnerable to diseases from colds to cancer, flu to heart disease.

Fortunately, there's a lot you can do to strengthen your immune system. One of the most powerful immune boosters is having fun. So here's your prescription for laughter, laziness and immune-boosting pleasure: Pray. Researchers at Duke University Medical Center in Durham, N.C., ...

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