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Does chilly weather really cause a cold?
Does chilly weather really cause a cold?

Maybe Mom was right all along. Although generations of parents have warned their children that venturing into the cold without a hat will make them sick, scientists have long understood that viruses cause the common cold, and that they can strike in all seasons. Now, however, new research suggests that cool temperatures may indeed play a role in fostering colds. In a paper published this week in the Proceedings of the National Academy of Sciences, a group of Yale University researchers reported that cooler temperatures greatly inhibit the natural virus-fighting ability of cells in the nose — or at least in the noses of mice. Rhinoviruses are the most frequent cause of the common...

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