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本帖最后由 ccmail 于 2021-5-2 13:28 编辑
英文的原文来了
对于喜欢把科学问题 / 讨论，不会好好说话好好讨论，偏偏要当作政治武器来各种刁钻角度来恶心中国
真不给力啊，刚刚没高兴几个小时 
https://www.ft.com/content/87335d59-1598-4887-bfb9-4b1e3a226399
Individuals who receive one shot of the Covid-19 vaccine and have never been infected by the virus could be very vulnerable to new variants, according to a new UK study.
Researchers from Imperial College London, Queen Mary University of London and University College London looked at immune responses in healthcare workers who had received one shot of the BioNTech/Pfizer vaccine.
The scientists found that people who had not previously been infected by Covid-19 showed very low levels of neutralising antibodies against the original strain from Wuhan, the B.1.1.7 variant first identified in Kent and B.1.351 from South Africa.
By contrast, those who had previously had mild or asymptomatic infection and then received a single dose appeared to have greatly enhanced protection against both B.1.1.7 and B.1.351, demonstrating high neutralising antibodies and a strong response by T cells, which remember past infection.
One dose without prior infection “does look very very feeble, especially against new variants,” said Danny Altmann, professor of immunology at Imperial. “Our message would be hold on in there until you get your second dose.”
But, Altmann added, prior infection coupled with a single shot of the vaccine elicited a “stupendous reaction”. “Prior infection rescues your response against variants,” he said.
The Imperial paper was released shortly after the first detailed study of “vaccine failure” in the UK, commissioned by the government’s Scientific Advisory Group on Emergencies (Sage), found that more than 500 elderly people developed Covid-19 symptoms severe enough for them to be hospitalised at least three weeks after vaccination, 113 of whom later died.
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