BRIEF-Pfizer CEO Says Don't Know If There Is A Need For Fourth Booster - CNBC Interview

Jan 10 (Reuters) -

* PFIZER CEO SAYS DON'T KNOW IF THERE IS A NEED FOR FOURTH BOOSTER - CNBC INTERVIEW

* PFIZER CEO SAYS WORKING ON A NEW VERSE OF VACCINE EFFECTIVE AGAINST OMICRON AS WELL AS OTHER VARIANTS - CNBC INTERVIEW

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