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A federal advisory panel recommended that the next batches of COVID-19 vaccines focus on XBB variants, while questioning how often younger people in good health would need additional shots.
The action follows a key advisory committee's 21-0 vote that a new vaccine should focus on just one strain of the virus, and not be a bivalent shot as before.
An FDA advisory committee on Thursday voted in favor of a respiratory syncytial virus vaccine that would be administered to pregnant people to protect their infants.
The FDA's vaccine advisers lent support to the agency's plan to try to simplify future COVID shots, with an aim of having many people get just one dose in the fall.
The notion of multiple boosters per year is not sustainable or advisable, say experts.