Why a Booster is Needed to Fight the Omicron Variant of COVID-19

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A booster dose of the Pfizer or Moderna vaccine offers optimal protection against the Omicron variant of COVID-19. Keith Armitage, MD, infectious disease physician and Medical Director, UH Roe Green Center for Travel Medicine & Global Health explains why.

00:00 Why the spike protein and many mutations of Omicron is playing a role

00:36 Efficacy of Pfizer and Moderna vaccines against Delta compared to Omicron

00:51 Added efficacy of the booster

01:00 Omicron may be nearly as contagious as measles


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