Too late to edit my comment, but a somewhat authoritative source claims 10-15% of colds are caused by coronaviruses (UpToDate, if you're curious). The study I r

Too late to edit my comment, but a somewhat authoritative source claims 10-15% of colds are caused by coronaviruses (UpToDate, if you're curious). The study I read may have been referring to a specific coronavirus that was mentioned in the original post.