NEW—Even for the #DeltaVariant, vaccine efficacy against severe #COVID19 so high that booster doses for general population are not appropriate at this stage in the pandemic.

Expert review of evidence to date by intl. group of scientists: https://t.co/3gytNuwrw9 #VaccinEquity pic.twitter.com/gsZbjLeJjW

— The Lancet (@TheLancet) September 13, 2021