Booster shots in adults who received the Pfizer-BioNTech vaccine were highly effective at preventing symptomatic Covid-19 breakthrough infections, Pfizer announced on Thursday. The company said…
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Brazil Senate’s Pandemic Panel, in Last-Minute Shift, Softened Criminal Recommendations on Bolsonaro
People who received a J. & J. vaccine may be better off with a Moderna or Pfizer booster, a study finds.