The US Food and Drug Administration on Friday authorised booster doses of Covid-19 vaccines for all adults who were vaccinated with the Pfizer Inc and partner BioNTech SE shot and the Moderna Inc shot.
The regulator's decision paves the way for millions of Americans to get additional protection and is aimed at addressing waning protection among fully vaccinated Americans in the face of Delta variant-driven breakthrough cases of the illness.
It authorised the Pfizer/BioNTech or Moderna booster for all adults who had their second dose of the vaccine six months prior.
"Streamlining the eligibility criteria and making booster doses available to all individuals