Endless variants..

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. Scientists had previously identified 99 distinct rhinovirus types. Recently, however, a number of unknown types were detected in patients with severe flu-like illnesses.

https://www.nih.gov/news-events/nih-research-matters/understanding-common-cold-virus