By chance have you previously endured a cold? Peradventure did you get rid of the virus? Naturally you survived it! You cannot cure a cold directly, however your immune system normally creates immunity to a certain cold infection within a couple of days. That is called being cured by your very own immune response!

Grownups have actually previously had a lot of the cold viruses. Adults have acquired immunity to the viruses they have suffered from. Therefore there are not lots of cold viruses around for parents to catch. That is why parents only get infected with a few colds per year whereas children may get a dozen runny noses annually.
https://orcid.org/0000-0001-5398-6043