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迷糊了。打疫苗反而减少保护?

(2021-04-10 14:06:40) 下一个

But among patients who had received two doses of the vaccine, the variant’s prevalence rate was eight times higher than those unvaccinated – 5.4% versus 0.7%.

https://financialpost.com/pmn/business-pmn/south-african-variant-can-break-through-pfizer-vaccine-israeli-study-says?

 

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