[TigersEye]

While there are many viruses that cause the common cold, only 4 are coronaviruses, ...

There are only 3 other coronaviruses known to infect humans, ...

That sounds like a contradiction.

[ETCM]

That sounds like a contradiction.

Maybe I just worded my post poorly. There are only 7 coronaviruses known to infect humans. 4 of them cause common cold, 1 causes MERS, 1 causes SARS and 1 causes COVID-19 (AKA SARS2).

There are many other viruses that ALSO cause common cold, but they are not coronaviruses. Most are rhinoviruses.