And definitely you will eventually acquire one more cold, since there are 300 different cold infections. Yet you will never ever get the exact same cold infection that you had previously due to the fact that you have actually established resistance to that particular cold virus.

Parents have previously had a lot of the runny nose infections. Adults have developed immunity to the ones they have had. So there are not lots of cold infections around for parents to become infected with. That is why adults just get a couple of colds each year and children acquire 10-12 runny noses per year.
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