And of course you will eventually get another cold virus, since there exist over 300 various cold viruses. However you will certainly unlikely acquire the very same runny nose infection that you had in the past because you have actually developed immunity to that virus.Grownups have actually already had a lot of the cold viruses. Grownups have actually developed immunity to the colds they have actually had. Therefore there are not as many runny nose viruses around for parents to catch. That is why adults only acquire a couple of runny noses per year and youngsters acquire a dozen runny noses each year.