A Covid-19 vaccine being developed by Pfizer and Germany’s BioNTech has been found to be more than 90 per cent effective, in a breakthrough that could make the shot available for use by the end of the year if drug authorities give it the green light.
辉瑞(Pfizer)和德国BioNTech联合开发的新型冠状病毒肺炎（COVID-19，即2019冠状病毒病）疫苗被发现具有90%以上的有效率。这一突破意味着这种注射剂有望在获得药监部门批准后，在今年底就可用。
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