And of course you will most likely acquire a different cold virus, because there are over 300 different runny nose infections. But you will certainly never get the same cold infection that you had before since you have actually established immunity to that particular cold virus.Grownups have actually previously had a lot of the cold viruses. Parents have acquired immunity to the viruses they have actually had. Therefore there are not numerous cold infections around for parents to become infected with. That is why parents only get a few colds per year whereas children usually get 10-12 colds annually.