There are over 200 viruses known to cause a "cold." They include several families, like rhinoviruses, adenoviruses and coronaviruses. As a rule, those families don't "lie dormant" like herpesviruses.

Getting a cold often incurs some immunity to that virus, and maybe a few of its cousins, for a few months or years. But immunity to one virus doesn't guarantee immunity from all the other cold viruses.

Also bacteria can cause superinfections in compromised tissue, and general infections or metabolic stress makes one more susceptible to viral infections. Cold sores come back under stress, but those are herpesvirus, not "cold" viruses.

NIH: More than 200 different viruses are known to cause the symptoms of the common cold. An estimated 30-35% of all adult colds are caused by rhinoviruses. In people with asthma, particularly children, rhinovirus infections are also frequently associated with flare-ups.

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