Perhaps have you once suffered through a common cold? Possibly did you recover from it? Obviously you did! You can't treat a common cold directly, but your body generally creates immunity to a specific cold infection within a few weeks. That is called being healed by your own immunity!Adults have previously had a lot of the rhinitis infections. Parents have actually acquired resistance to the ones they have actually suffered from. Therefore there are not so many runny nose infections remaining for adults to acquire. That is why grownups just get infected with a few runny noses per year whereas kids succumb to a dozen colds annually.