The Food and Drug Administration could authorize a second COVID-19 vaccine booster this week for those age 50 or older. Talk of a fourth shot has picked up as the omicron subvariant BA.2 spread throughout Europe, with the UK, Chile, Israel, and Sweden already allowing a fourth shot for vulnerable parts of the population.
Both Moderna and Pfizer-BioNTech have asked the FDA to authorize a fourth shot; Moderna asked for authorization for all adults, and Pfizer-BioNTech asked for authorization of a second booster for people 65 and older. Both companies say protection from the first booster weakens after a few months.
Sources say the FDA and the CDC aren’t expected to get the advice of their advisory committees. The FDA has a vaccine advisory meeting scheduled for April 6, but no votes are planned for that meeting.
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