Likely have you previously had a cold virus? By any chance did you recover from the virus? Certainly you did! You will not treat an acute rhinitis directly, yet your body typically establishes resistance to a particular cold infection within a few weeks. That is called being healed by your own immune system!Grownups have in the past had a lot of the cold infections. Parents have actually acquired resistance to the colds they have had. Therefore there are not as many runny nose viruses around for grownups to become infected with. That is why parents only acquire a few runny noses per year and kids acquire 10-12 colds annually.