As the cell count drops, the immune system begins to fail and opportunistic infections such as tuberculosis take hold.
随着细胞数量的减少，免疫系统开始失效，之后，像肺结核这样的感染则会趁虚而入。
As the cell count drops, the immune system begins to fail and opportunistic infections such as tuberculosis take hold.
随着细胞数量的减少，免疫系统开始失效，之后，像肺结核这样的感染则会趁虚而入。
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