By chance have you ever had a cold virus? By chance did you heal from the virus? Naturally you recovered! You won't heal a common cold directly, nevertheless your system normally develops resistance to a specific cold infection within a few days. That is called healed by your own immune system!Grownups have in the past had a great deal of the runny nose infections. Adults have actually acquired resistance to the viruses they have actually had. So there are not lots of cold viruses around for adults to catch. That is why adults only get a few colds annually whereas children acquire a dozen colds per year.