By chance have you once suffered through a cold virus? Maybe did you get rid of the cold? Obviously you recovered! You will not cure a common cold directly, however your immune system generally establishes resistance to any type of cold infection within a few weeks. That is called cured by your own immune system!

Adults have previously had a lot of the runny nose infections. Adults have developed immunity to the viruses they have suffered from. Therefore there are not so many runny nose infections existing for adults to become infected with. That is why parents only acquire a couple of runny noses annually and children acquire 10-12 runny noses each year.
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