Perchance have you once been down with acute rhinitis? Probably did you heal from the problem? Obviously you recovered! You will not heal a common cold itself, however your immune system generally creates resistance to a particular cold infection within a few days. We call that cured by your personal immune system!

Adults have actually previously had a lot of the cold infections. Grownups have actually established resistance to the colds they have had. Therefore there are not so many cold infections around for parents to become infected with. That is why parents just succumb to a few runny noses annually whereas kids acquire 10-12 colds annually.
https://trentonnzfn.bloggersdelight.dk/2021/07/24/hpv-virus-cure-research/