FDA authorizes second coronavirus booster dose for people 50 and older - The Washington Post

…The Food and Drug Administration authorized a second booster shot of the Pfizer-BioNTech and Moderna coronavirus vaccines for people 50 and older at least four months after their first booster…

https://www.washingtonpost.com/health/2022/03/29/fda-authorizes-second-booster-shot/