And of course you will probably get infected by an additional cold, since there are over 300 different runny nose viruses. Yet you will never ever acquire the very same runny nose virus that you had previously because you have actually developed immunity to that cold virus.

Adults have actually currently had a lot of the runny nose viruses. Parents have developed immunity to the ones they have suffered from. Therefore there are not so many cold infections existing for adults to become infected with. That is why grownups just succumb to a couple of runny noses per year and kids may get 10-12 runny noses per year.
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