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据外媒报道，美国政府将斥资近20亿美元购买1亿剂由美国制药巨头辉瑞公司和德国BioNTech公司合作研发的新冠肺炎疫苗。这些疫苗可供5000万人接种。如果疫苗最终证明是安全有效的，美国可以根据该协议再购买5亿剂。 Small bottles labelled with "Vaccine" stickers seen near a medical syringe in front of displayed "Coronavirus COVID-19" words, April 10, 2020. [Photo/Agencies] The US government will pay nearly $2 billion to buy enough of a COVID-19 vaccine being developed by Pfizer Inc and German biotech BioNTech SE to innoculate 50 million people if it proves to be safe and effective, the companies said on Wednesday. 辉瑞公司和德国生物技术公司BioNTech本周三The contract for 100 million doses of the vaccine amounts to a $39 price tag for what is likely to be a two-dose course of treatment. 这份疫苗合同数量为1亿剂，每人可能需要接种两次，每个疗程相当于39美元。 The contract is the most the United States has agreed to spend on a vaccine, although previous deals with other vaccine makers were intended to also help pay for development costs. 这份合同是美国购买疫苗的最高总价，之前美国与其他疫苗制造商的交易还包括帮助支付研发成本。 Pfizer and BioNTech will not receive any money from the government unless their vaccine succeeds in large clinical trials and can be successfully manufactured, according to a Pfizer spokeswoman. | 
