Merck, one of the world’s leading vaccine makers, is ending its Covid-19 vaccine development after its two candidates failed to elicit immune responses as strong as those seen from shots that are already available.
作为世界领先的疫苗生产商之一,默克公司(Merck,在美国和加拿大以外地区被称为默沙东(MSD)——译者注)将终止其新型冠状病毒肺炎(COVID-19,即2019冠状病毒病)疫苗开发工作,因为其两款候选疫苗诱导出的免疫应答没有已经推出的疫苗那么强。
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