Likely have you previously been down with a common cold? Perhaps did you eliminate the infection? Obviously you recovered! You cannot cure a common cold itself, but your immune system usually creates immunity to a certain cold virus within a couple of days. We call that cured by your personal immune system!Grownups have in the past had a lot of the rhinitis infections. Grownups have acquired resistance to the colds they have actually had. So there are not so many cold viruses around for parents to acquire. That is why adults only get infected with a few colds per year whereas children usually get a dozen colds annually.