UK health secretary Matt Hancock has announced that more than 60 million coronavirus vaccine doses have been given so far.
Hancock said Saturday was a “huge day” with 762,361 first or second jabs given, one of the highest daily totals since the rollout started.
It comes as a study found the Pfizer and AstraZeneca vaccines are highly effective after two doses against the variant identified in India.
The UK Health Security Agency’s head urged people to get their second dose.
The latest government data shows 556,951 UK adults received a second jab on Saturday, meaning that 43 percent of the adult population – 22,643,417 people – have now been fully vaccinated.
A total of 205,410 first doses were administered, with that measurement reaching 37,943,681 people, or 72 percent of UK adults.
Public Health England, which ran the study into the two vaccines said they are likely to be even more effective at preventing hospital admission and deaths.
Some 13,000 deaths and 39,100 hospitalizations have been prevented in the UK due to the vaccination program up to 9 May, according to PHE analysis.
Dr Jenny Harries, chief executive of the UK Health Security Agency, said the study was the “first real-world evidence of vaccine effectiveness” against the variant and the “straightforward message” was for people to get both doses.