Britain has said it had offered all over-50s a first dose of the Covid-19 vaccine, hitting a target to offer injections to all people in its nine highest priority groups by April 15.

Britain has seen one of the world’s quickest vaccine rollouts, behind only Israel in the proportion of its population receiving at least one dose of a Covid-19 shot, according to Reuters.

The government said it had offered at least one shot to priority cohorts 1 to 9, which include all adults over 50, the clinically vulnerable, and health and social care workers, ahead of Thursday’s deadline.

“We have now passed another hugely significant milestone in our vaccine programme by offering jabs to everyone in the nine highest risk groups,” Prime Minister Boris Johnson said in a statement.