AstraZeneca has revised the efficacy rate for its US Covid-19 vaccine trial down to 76 per cent as the pharmaceutical group sought to address concerns that it had published incomplete interim data earlier this week.
阿斯利康(AstraZeneca)將其美國新型冠狀病毒肺炎（COVID-19，即2019冠狀病毒病）疫苗臨床試驗的有效率向下修正為76%。該制藥集團尋求化解本周早些時候出現的、認為其發表了不完整的中期數據的擔憂。
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