An additional 'booster' dose of Moderna or Pfizer mRNA-based vaccine is needed to provide immunity against the Omicron variant of SARS-CoV-2, the virus that causes COVID-19, according to a study by researchers at the Ragon Institute of MGH, MIT and Harvard. The results of this study, reported in the journal Cell, indicate that traditional dosing regimens of COVID-19 vaccines available in the United States do not produce antibodies capable of recognizing and neutralizing the Omicron variant. In late November, health officials in South Africa reported that a previously unknown variant of SARS-CoV-2 was rapidly spreading throughout the country. The variant, given the name Omicron by the World Health Organization, would soon prove to be far more transmissible than Delta, the variant that previously had caused the majority of COVID-19 infections. 'People desperately wanted to know whether current vaccines protect against Omicron,' says the senior author of the Cell paper, Alejandro...
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