Pfizer Inc said on Monday its experimental vaccine was more than 90% effective in preventing COVID-19 based on initial data from a large study, a major victory in the fight against the pandemic.
疫苗当然必须防感染的， Two doses of MMR vaccine are about 97% effective at preventing measles; one dose is about 93% effective. 新冠疫苗刚上市时也说防感染有效率90%多。现在大家知道新冠疫苗一点都不防感染，拉低了疫苗的底线，变成疫苗都不用防感染了。
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2023-8-24(#15627037@0)+12
Pfizer Inc said on Monday its experimental vaccine was more than 90% effective in preventing COVID-19 based on initial data from a large study, a major victory in the fight against the pandemic.
你太无知了，曾几何时，还有论文在证明新冠疫苗是防感染的，Several studies have provided evidence that vaccines are effective at preventing infection。
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Vaccines that work against SARS-CoV-2 have helped change the course of the pandemic by reducing illness and hospital admissions. But Chris Stokel-Walker asks what we know about their impact on preventing transmission.
The range of vaccines developed in record time by pharmaceutical companies and research laboratories have helped quell the worst effects of SARS-CoV-2. But much of the focus of research has been on effectiveness in preventing infection, illness, and hospital admission. What is less well measured is the impact of vaccination on preventing onward transmission.
Most papers to date (notably, many are preprints and have yet to be peer reviewed) indicate vaccines are holding up against admission to hospital and mortality, says Linda Bauld, professor of public health at the University of Edinburgh, “but not so much against transmission.”
The first weekly covid-19 vaccine surveillance report for 20221 from the UK Health Security Agency (UKHSA) was more positive than Bauld’s assessment—but didn’t say outright that covid-19 vaccines prevent transmission. “Several studies have provided evidence that vaccines are effective at preventing infection,” it states, “Uninfected people cannot transmit; therefore, the vaccines are also effective at preventing transmission.”
A study2 of covid-19 transmission within English households using data gathered in early 2021 found that even a single dose of a covid-19 vaccine reduced the …
斯坦福研究报告里的这句简单英文能看懂吗？These findings add to the mounting evidence demonstrating that vaccination is extremely effective at preventing COVID-19 infection
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A Stanford study finds that the mRNA vaccines, Pfizer and Moderna, offer strong protection against the California variant of the coronavirus.
你能看懂英文的话把这句话翻译成中文：These findings add to the mounting evidence demonstrating that vaccination is extremely effective at preventing COVID-19 infection
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