The Russian vaccine, Sputnik V, “has an impressive 91.6 percent efficacy rate against the virus.” It “is completely protective against severe cases of Covid-19.”
NYT efficacy [‘efɪkəsɪ] эффективность
rate [reɪt] уровень, величина:
efficacy rate эффективность, уровень /
степень эффективности
severe [sɪ’vɪə] суровый; severe cases тяжёлые случаи
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