Medically, the condition is called X-linked Severe Combined Immunodeficiency (X-SCID).

在医学上，这种情况称为X连锁重症联合免疫缺陷(X - SCID)。

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For example, in a gene therapy trial for X-SCID - or "bubble-boy" disease - inserting a gene in the wrong place triggered cancer in some of the recipients.

比如，在X光免疫缺陷和“泡泡男孩”疾病的基因疗法试验中，就因基因植入错误而引发了试验者的癌症。

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Originally the trials were considered a huge success when a number of patients were successfully treated for the X-linked Severe Combined Immunodeficiency Syndrome (X-Scid) which is more commonly known as the "Boy in the Bubble" syndrome.

BBC: Gene therapy 'causes leukaemia'