Probably have you previously endured a cold? Probably did you get rid of it? Obviously you did! You will not treat a common cold itself, however your immune system usually develops resistance to a specific cold infection within a few weeks. We call that being cured by your own immune response!Adults have in the past had a great deal of the cold infections. Adults have acquired resistance to the viruses they have suffered from. Therefore there are not lots of cold infections remaining for grownups to acquire. That is why parents only get infected with a few colds annually whereas youngsters get a dozen colds per year.