Which is correct, dozen other or dozen others? [closed]

Is it grammatically correct to write "dozen other" and "several other" in singular form as in the following quote from the CNN News of Nov. 29?

"Omicron was first identified by scientists in South Africa, who raised alarm over its unusually high number of mutations on Thursday. Since then, at least dozen other have confirmed cases of the new strain, with several other reporting suspected cases."

Solution 1:

"Dozen other" must have been a typo. I believe that is grammatically incorrect. "Several other" on the other hand, is grammatically correct. Please correct me if my answers are wrong.