The viruses and bacteria that are commonly found in a child's nose or throat, can infect the lungs if they are inhaled.
病毒和细菌通常在儿童的鼻腔或咽喉处可发现，如被吸入则可感染肺部。
Other changes might enable the virus to spread beyond the lungs and infect other organs like brain, intestine or liver, causing a more severe infection and even death.
还有一些变异能够使病毒感染肺部之外的器官，像大脑、肠道或肝脏等，引起更严重的感染，甚至死亡。
Then the pathogen Klebsiella pneumoniae was given to infect the lungs and the experimental model of lobular pneumonia in the mice was thus established successfully.
然后以病原体肺炎克雷伯菌攻击小鼠肺脏造成肺部感染，从而成功地建立了小鼠实验性支气管肺炎模型。
Then the pathogen Klebsiella pneumoniae was given to infect the lungs and the experimental model of lobular pneumonia in the mice was thus established successfully.
然后以病原体肺炎克雷伯菌攻击小鼠肺脏造成肺部感染，从而成功地建立了小鼠实验性支气管肺炎模型。
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