LONDON- Prime Minister Boris Johnson hailed the success of Britain's vaccine programme after data showed 15 million first doses had been delivered, but he added there was still a long way to go.
"Today we have reached a significant milestone," he said.
"No one is resting on their laurels... We've still got a long way to go and there will undoubtedly be bumps in the road, but after all we've achieved I know we can go forward with great confidence."
(Reporting by William James Editing by Gareth Jones) ((william.james@thomsonreuters.com; +44 207 542 3374; Reuters Messaging: william.james.thomsonreuters.com@reuters.net))
