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Booster Shot

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FRIDAY, Jan. 7, 2022 (HealthDay News) -- Citing the rapid spread of the omicron variant and the need for protection against it, U.S. federal health officials are shortening the recommended time between the second dose of the Moderna vaccine and a booster shot from six months down to five.

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Biotechnology company Moderna announced Monday that preliminary data suggests its half-dose booster shot increased antibody levels against Omicron compared with the levels seen when a fully vaccinated person does not receive a booster -- and a larger-sized dose of the booster increases antibody levels even more.

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A federal advisory panel endorsed a plan to give Pfizer booster shots against COVID-19 to those who are 65 or older or run a risk of severe disease after rejecting a plan to give extra shots to most Americans.

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