Possibly have you formerly had a cold virus? Probably did you heal from the infection? Obviously you recovered! You can't heal a cold directly, however your system typically creates resistance to a specific cold virus within a few days. That is called being healed by your very own immunity!

Parents have actually in the past had a lot of the runny nose viruses. Parents have actually developed resistance to the ones they have actually had. So there are not as many cold viruses remaining for grownups to become infected with. That is why adults only get infected with a couple of colds annually whereas youngsters acquire a dozen runny noses each year.
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