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No Omicron immunity without booster, study finds

n 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.