And sure you will probably get one more cold virus, because there exist 300 different runny nose viruses. However you will certainly never ever get the exact same cold infection that you had previously due to the fact that you have actually developed resistance to that particular cold virus.

Adults have currently had a lot of the cold infections. Parents have created resistance to the viruses they have suffered from. Therefore there are not so many runny nose viruses around for parents to become infected with. That is why grownups just succumb to a couple of runny noses annually whereas youngsters get a dozen runny noses each year.
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