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医学期刊《刺针》周三发表美国学者的文章，文章声称新冠肺炎存在性别差异，或与中国男性吸烟习惯有关。

来自美国加州洛杉矶大学医学院麻醉与分子学系女教授Hua Cai，在题为《新冠肺炎患者的性别差异和吸烟倾向》的文章中指出，一项使用单细胞测序的研究发现，血管紧张素转化酶2(ACE2)的表现在亚洲男性中更为主要，或是亚洲患者中男性感染率高于女性的原因。

研究也显示，亚裔吸烟者的血管紧张素转化酶2表现明显高于不吸烟者。

Hua Cai认为，新冠肺炎在中国患者中的性别差异表现，可能与中国男性吸烟率较女性高有关。

据了解，新型冠状病毒是通过刺突糖蛋白(S蛋白)与宿主细胞ACE2结合，从而入侵细胞，引起组织损伤。

早前英国诺丁汉大学呼吸系统疾病专家詹金斯也指出，吸烟者患上新冠肺炎的风险较非吸烟者高。