Two doses of Pfizer, AstraZeneca shots effective against Delta variant: study

Officials say vaccines are highly effective against the Delta variant, now the dominant variant worldwide. - Reuters

LONDON (Reuters): Two doses of Pfizer or AstraZeneca's Covid-19 vaccine are nearly as effective against the highly transmissible Delta coronavirus variant as they are against the previously dominant Alpha variant, a study published on Wednesday (July 21) showed.

Officials say vaccines are highly effective against the Delta variant, now the dominant variant worldwide, though the study reiterated that one shot of the vaccines is not enough for high protection.