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保送外刊精读 | 美国流感季“失控”:确诊难、疫苗差,何时是尽头?
美国正处于至少七年来最严重的流感季。美国疾病控制与预防中心估计,自去年10月以来,约有2900万美国人感染了流感,比去年同期多20%。自2020年以来,流感首次导致的住院和死亡人数超过了新冠疫情(见图1)。
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