And of course you will probably get infected by one more runny nose virus, since there are several hundred various cold infections. But you will unlikely acquire the same cold infection that you had in the past because you have created immunity to that particular cold virus.

Adults have currently had a lot of the cold infections. Grownups have actually created immunity to the viruses they have had. Therefore there are not numerous runny nose infections around for grownups to acquire. That is why grownups just get infected with a couple of runny noses annually and youngsters may get 10-12 runny noses per year.
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