People who are simultaneously infected with Covid-19 and influenza face double the risk of death, according to a new study, highlighting the challenge being posed to health systems as flu re-emerges.
一项新的研究表明，同时感染新冠病毒和流感的人面临双倍的死亡风险，这突显出随着流感再次出现，卫生系统面临的挑战。
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