Will a Covid-19 vaccine booster be needed later this year?

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Vaccine makers are preparing for a next possible phase of the Covid-19 vaccine rollout: booster doses. CNN’s Dr. Sanjay Gupta reports on these booster studies.
See source for video.
Vaccine makers are preparing for a next possible phase of the Covid-19 vaccine rollout: booster doses. CNN’s Dr. Sanjay Gupta reports on these booster studies.