By any chance have you ever suffered through a common cold virus? By any chance did you eliminate the virus? Certainly you got over it! You will not treat a runny nose directly, yet your body usually establishes immunity to a specific cold virus within several weeks. That is called cured by your personal immune system!Grownups have actually previously had a lot of the runny nose infections. Adults have actually acquired resistance to the viruses they have suffered from. Therefore there are not lots of runny nose viruses around for parents to catch. That is why grownups only succumb to a few colds annually whereas youngsters get a dozen runny noses annually.