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Moderna's vaccine is the most effective, but Pfizer and J&J also protect well, CDC-led study says
By Maggie Fox
Covid-19: How effective is a third vaccine dose?
By Zaria Gorvett
FDA panel votes against broad rollout of Pfizer booster shot, endorses narrower use
By Lauren Gardner
New Study of Covid Booster Shots Fans Debate Over Benefits (Published 2021)
By Apoorva Mandavilli
FDA advisory panel rejects widespread Pfizer vaccine booster shots
By Lauran Neergaard & Matthew Perrone