So, they don't start killing all the cells in your respiratory system; they only kill the cells that are harboring the virus.

所以它们不会杀死所有呼吸系统内的细胞,只杀死那些被病毒感染的细胞

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That virus is reproducing inside cells of your respiratory tract.

病毒在你的呼吸道细胞内繁殖

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