And definitely you will eventually cave in to another cold, since there exist 300 various runny nose infections. However you will never get the very same runny nose infection that you had before due to the fact that you have created resistance to that particular virus.Adults have already had a lot of the rhinitis infections. Parents have actually acquired immunity to the colds they have actually had. Therefore there are not as many cold viruses around for adults to catch. That is why grownups just acquire a few colds each year whereas kids usually get 10-12 colds annually.