Background:Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infections and the resulting disease,coronavirus disease 2019(Covid-19),have spread to millions of persons worldwide.Multiple vaccine candidates are under development,but no vaccine is currently available.Interim safety and immunogenicity data about the vaccine candidate BNT162b1 in younger adults have been reported previously from trials in Germany and the United States.
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机译:营造安全文化 提升安全理念 精心打造三峡工程安全文化品牌Creating a Safety Culture,Promoting a Safety Idea and Elaborately Establishing a Safety Culture Brand for the Three Gorges Project