减毒的沙门氏菌是一种非病原性细菌，能靶向肿瘤并产生局部抗肿瘤的效应。
Attenuated salmonella is a group of non-pathogenic bacteria that can target tumors and has local anti-tumor effects.
目的探讨广州地区婴幼儿非细菌性下呼吸道感染病原学特征。
Objective to investigate the nonbacterial etiology of children's acute lower respiratory infection in Guangzhou.
目的探讨广州地区婴幼儿非细菌性下呼吸道感染病原学特征。
Objective to investigate the nonbacterial etiology of children's acute lower respiratory infection in Guangzhou.
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