Sept 22 (Reuters) - The U.S. Food and Drug Administration will authorize a booster dose of the Pfizer Inc and BioNTech COVID-19 vaccine for those aged 65 and older and some high-risk Americans, a Bloomberg News reporter said in a tweet https://twitter.com/LauraLitvan/status/1440797321126563842 on Wednesday.

An FDA spokesperson declined to comment.

(Reporting by Manas Mishra in Bengaluru; Editing by Sriraj Kalluvila and Anil D'Silva)