U.K. Delays Second Covid-19 Vaccine Dose as Europe Ponders How to Speed Up Immunization... - 0 views
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The U.K. will focus on giving as many people as possible a first dose of a coronavirus vaccine, even if this delays administering a second one, the government said Tuesday, despite a lack of data about the extent of the immunity conferred by a single dose.
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A vaccine made by Pfizer Inc. and BioNTech SE was the first to be authorized in the West. It is now being unrolled globally after emergency authorizations by various regulators on the basis of a successful monthslong trial that involved giving two shots to more than 20,000 volunteers. The second injection was administered 21 days after the first.
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While the trial data shows that the vaccine conferred immunity to over 50% of the participants after the first dose, marketing only one shot would require a new study in which only one dose would be administered to another set of volunteers, said BioNTech Chief Executive Uğur Şahin.
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