Conceivably have you ever before been down with a cold? Likely did you do away with it? Certainly you got over it! You can't treat a common cold directly, yet your immune system usually creates resistance to any cold virus within several weeks. That is called healed by your very own immune system!Adults have previously had a lot of the cold infections. Grownups have established immunity to the colds they have suffered from. So there are not quite as many runny nose viruses around for parents to become infected with. That is why parents just acquire a few runny noses annually whereas kids acquire 10-12 runny noses each year.