UK says new study vindicates delaying 2nd virus vaccine shot

LONDON (AP) — Britain’s health chief has hailed a new study suggesting that a single dose of the Oxford-AstraZeneca COVID-19 vaccine provides a high level of protection for 12 weeks, saying it supports the government’s contentious strategy of delaying the second shot so it can protect more people quickly with a first dose.

Britain’s decision has been criticised as risky by other European countries, but Health Secretary Matt Hancock said Wednesday that the study “backs the strategy that we’ve taken and it shows the world that the Oxford vaccine works effectively.”

Hancock’s comments came after Oxford University released a study showing the vaccine cut transmission of the virus by two-thirds and prevented severe disease.

Mene Pangalos, executive vice president of biopharmaceuticals research and development at AstraZeneca, said no patients experienced severe COVID-19 or required hospitalisation three weeks after receiving a first dose, and that efficacy appeared to increase up to 12 weeks after the initial shot.

“Our data suggest you want to be as close to the 12 weeks as you can” for the second dose, Pangalos said during a news conference.

The study has not been peer-reviewed yet, and it did not address dosing of the Pfizer-BioNTech vaccine, the other one currently in use in the U.K.

Pfizer recommends that its shots be given 21 days apart and has not endorsed the U.K. government’s decision to lengthen the time between doses.

But the Oxford research was greeted with excitement by U.K. officials under pressure to justify their decision to delay the second dose.

“That reduction in transmission, as well as the fact there is no hospitalisations, the combination of that is very good news. And it categorically supports the strategy we’ve been taking on having a 12-week gap between the doses,” Hancock told Sky News.

Some countries, including France, have authorised the AstraZeneca vaccine only for use in people under 65, saying there is not enough evidence to say whether it works in older adults.

Belgium has authorised it only for people 55 and under.

Yet one of the lead researchers on the Oxford vaccine project, Dr. Andrew Pollard, said “we expect it to be highly effective in older adults” and said more data should be available in the next few weeks.

Pangalos noted that the European Medicines Agency had authorised the vaccine for use in all people over age 18.

“How individual countries decide to implement vaccines is ultimately up to them based on the vaccine supplies that they have,” he said.

Vaccine supply is a sensitive issue in the European Union, which is unhappy that AstraZeneca cut back on the number of doses it plans to supply the EU with in the near term.

Britain has Europe’s deadliest coronavirus outbreak, with more than 108,000 deaths, and is in its third national lockdown as authorities try to contain a new, more transmissible virus variant first identified in southeast England.

Other variants are also a concern.

Public health officials in England are going door to door, trying to test all adults in eight targeted communities in an attempt to stop a new strain first identified in South Africa from spreading further.

So far 105 cases of the variant have been identified in the U.K., 11 of them in people with no links to overseas travel.

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