U.K. approves coronavirus vaccine, plans to roll out in coming week

John Hopkins School of Public Health professor Dr. Marty Makary with insight on the Pfizer vaccine developments in the U.K.

The United Kingdom on Saturday was bracing for a possible "Tier 4" lockdown after officials said they have identified a new COVID-19 strain that can spread more quickly and is believed to be linked to a rise in infections across London and southeast England.

Prime Minister Boris Johnson, who was expected to make an announcement Saturday, refused on Friday to rule out a fresh national lockdown after the holidays.  

Britain’s Prime Minister Boris Johnson reacts, during a visit to the Openreach L and D Training Centre in Bolton, England, Friday, Dec. 18, 2020. 
(AP)

That same day, the country reported more than 28,500 new COVID-19 cases, with nearly 500 deaths. The latest official figures showed infections climbing across the U.K., with a sharp increase in London. The percentage of people testing positive over the past week rose in England, Wales, Scotland and Northern Ireland, according to data released Friday by the Office of National Statistics.

Mike Ryan, chief of the World Health Organization’s emergency program, said Monday that the WHO was aware of a genetic variant of COVID-19 reported in about 1,000 individuals in England.

"Authorities in the U.K. are looking at its significance. We have seen many variants – this virus evolves and changes over time," he said.

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England’s chief medical officer, Chris Whitty, told Reuters on Saturday that it was too early to tell whether the new strain caused a higher mortality rate or impacted vaccines.

"We have alerted the World Health Organization and are continuing to analyze the available data to improve our understanding," he said.

John and Whitty were expected at a news conference later Saturday to announce new measures to address the COVID-19 variant.

Officials moved this week to tighten up the existing restrictions for much of the population by putting large parts of southern England into the highest virus alert level, Tier 3.

Asked whether England would follow Northern Ireland in imposing a six-week lockdown starting Dec. 26, Johnson signaled he was prepared to take more drastic action.

"We're hoping very much that we will be able to avoid anything like that," Johnson said during a visit to Manchester. "But the reality is that the rates of infection have increased very much in the last few weeks."

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One expert was skeptical about the effectiveness of the U.K. government's three-tiered system of restrictions.

"At the moment it doesn't look like the tier system is holding the epidemic wave back, unfortunately," John Edmunds, a member of the government's Sage scientific advisory panel, told Sky News. "So I think we are going to have to look at these measures and perhaps tighten them up" after Christmas, said Edmunds, a professor at the London School of Hygiene and Tropical Medicine.

The Associated Press contributed to this report.

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