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No doubt you will eventually acquire an additional cold, since there remain several hundred different cold infections. However you will never ever get the same runny nose infection that you had previously due to the fact that you have developed immunity to that virus.

Parents have previously had a lot of the cold infections. Grownups have developed immunity to the colds they have had. Therefore there are not as many runny nose viruses around for parents to become infected with. That is why grownups only get infected with a few colds each year and youngsters may get a dozen colds each year.
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