And sure you will eventually succumb to one more cold virus, because there are 300 different runny nose infections. However you will never ever get the same cold infection that you had previously due to the fact that you have actually created resistance to that particular cold virus.

Adults have actually in the past had a lot of the cold infections. Grownups have acquired immunity to the viruses they have had. So there are not so numerous of cold viruses around for parents to acquire. That is why grownups just succumb to a couple of colds per year whereas children get a dozen runny noses per year.
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