And sure you will most likely cave in to another cold virus, since there are more than 300 different runny nose viruses. But you will unlikely acquire the exact same runny nose virus that you had previously because you have established immunity to that particular virus.Adults have actually already had a lot of the cold viruses. Adults have acquired immunity to the viruses they have actually suffered from. Therefore there are not numerous cold viruses around for adults to acquire. That is why parents just succumb to a couple of runny noses per year and kids may get a dozen colds annually.