“We think we have figured out the winning formula and how to get efficacy that, after two doses, is up there with everybody else,” Soriot said. “I can’t tell you more because we will publish at some point.”
Britain’s government says its medicines regulator is reviewing the final data from AstraZeneca’s phase three clinical trials.
The Times and others have reported that the green light could come by Thursday, and the vaccines can start to be rolled out for the British public in the first week of January.
Asked about the vaccine’s efficacy against the new variant of coronavirus spreading in the UK, Soriot said: “So far, we think the vaccine should remain effective. But we can’t be sure, so we’re going to test that.”
British authorities have blamed the new virus variant for soaring infection rates across the country. They said the variant is much more transmittable, but stress there is no evidence it makes people more ill.
British Prime Minister Boris Johnson sounded an urgent alarm about the variant days before Christmas, saying the new version of the virus was spreading rapidly and that plans to travel and gather must be cancelled for millions to curb the spread of the virus.
Authorities have since put increasing areas of the country — affecting about 24 million people, or 43 per cent of the population — in the strictest level of restrictions. Non-essential shops have closed, restaurants and pubs can only operate for takeout and no indoor socialising is allowed.
Many countries swiftly barred travel from the UK, but cases of the new variant have since also been reported in a dozen locations around the world.
Public health officials said on December 24 that more than 600,000 people had received the first of two doses of the Pfizer vaccine.
Britain recorded another 30,501 positive COVID-19 cases and a further 316 deaths on Sunday, bringing the country’s total death toll to 70,752.
Many hospitals are under pressure, including the largest hospital in Wales, which issued an urgent appeal on Saturday for health care staff or medical students to help care for coronavirus patients in intensive care.
The health board that runs University Hospital of Wales said on Sunday that the situation has improved, but its critical care unit remains extremely busy.