>Back to school means back to colds. In Ah-Choo! scientist Jennifer Ackerman offers tips.

SUPPLEMENTS DON’T WORK

Most have been pushed without good evidence. Vitamin C, Echinacea, Airborne: They won’t keep you from getting a cold.

CATCHING A CHILL’S OKAY

Being cold does not cause colds. Same for going outside with wet hair. Stop worrying, moms.

CHICKEN SOUP REALLY HELPS

There’s evidence it reduces inflammation, which reduces symptoms.

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