The European Medicines Agency (EMA) expects to decide in early October on the possible use of a booster dose of the Pfizer-BioNTech Covid-19 vaccine, a source with direct knowledge of the matter told Reuters.

It will be the EU drugs regulator's first decision on boosters, the source said, after the US Food and Drug Administration on Wednesday authorised a third dose of Pfizer for those 65 and older, all people at high risk of severe disease, and others who are regularly exposed to the virus.

"EMA's decision on the third dose of Pfizer is expected for...