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如何保证新冠疫苗的有效性？它距离上市还有多远？
source link: https://tech.sina.com.cn/d/f/2020-03-31/doc-iimxxsth2760656.shtml
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新浪科技讯北京时间3月31日消息，一项开展“人体挑战”研究的激进提议可能会极大地加快新冠疫苗研究的速度。在新冠疫情的背景下，数以亿计甚至数十亿计的人为了使自己和所处社区免于感染，开始与社会隔绝接触。为了尽快结束这场大流行，研究人员开始讨论一
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