The protection afforded by two doses of the Oxford/AstraZeneca coronavirus shots, including against severe disease, begins to wane three months after the second shot, according to a new study that highlights the importance of booster programmes.
根据一项新的研究,两针牛津/阿斯利康新冠疫苗所提供的保护,包括对严重疾病的保护,在第二针后三个月开始减弱,该研究强调了加强针计划的重要性。
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