科学家发现，一些人的免疫系统只能识别部分病毒，而不是全部。
Scientists found that some people's immune systems could recognise parts but not all of the virus.
新的移植肝脏造血干细胞侵入到她的骨髓来取代她自身全部的免疫系统，这意味着这个十几岁的孩子不再需要服用防排斥药物。
Her new liver's blood stem cells then invaded her body's bone marrow to take over her entire immune system, meaning the teen no longer needs anti-rejection drugs.
新的移植肝脏造血干细胞侵入到她的骨髓来取代她自身全部的免疫系统，这意味着这个十几岁的孩子不再需要服用防排斥药物。
Her new liver's blood stem cells then invaded her body's bone marrow to take over her entire immune system, meaning the teen no longer needs anti-rejection drugs.
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