And of course you will probably cave in to one more cold virus, due to the fact that there are over 300 various runny nose infections. Yet you will never get the exact same cold infection that you had previously due to the fact that you have actually developed resistance to that particular virus.

Grownups have previously had a lot of the runny nose infections. Parents have created immunity to the ones they have suffered from. Therefore there are not lots of cold viruses existing for grownups to catch. That is why grownups only acquire a couple of colds annually and children acquire a dozen runny noses each year.
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