Perhaps have you formerly suffered through acute rhinitis? By any chance did you get rid of the infection? Of course you did! You won't heal a cold directly, but your system typically develops immunity to any type of cold infection within a couple of weeks. That is called cured by your very own immune response!

Adults have previously had a lot of the cold viruses. Grownups have established immunity to the ones they have suffered from. So there are not lots of cold infections around for parents to acquire. That is why parents only acquire a couple of colds per year and children usually get 10-12 runny noses each year.
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