And of course you will eventually succumb to one more cold virus, since there exist several hundred different runny nose viruses. Yet you will never get the same runny nose virus that you had previously due to the fact that you have actually created immunity to that cold virus.Grownups have already had a great deal of the rhinitis infections. Adults have acquired immunity to the ones they have suffered from. So there are not so many cold viruses around for adults to acquire. That is why adults only succumb to a couple of colds annually and kids succumb to a dozen runny noses each year.