Perchance have you ever before had a cold virus? Possibly did you recover from the infection? Naturally you survived it! You won't cure a cold directly, however your immune system typically develops immunity to any cold virus within several days. That is called cured by your very own immunity!

Parents have actually previously had a lot of the cold infections. Parents have actually acquired resistance to the colds they have had. Therefore there are not so many runny nose viruses existing for parents to catch. That is why grownups just succumb to a few colds each year whereas kids succumb to 10-12 runny noses per year.
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