这个词是什么意思？
Group of rare congenital disorders characterized by impairment of both humoral and cell-mediated immunity, leukopenia, and low or absent antibody levels. It is inherited as an X-linked or autosomal recessive defect. Mutations occurring in many different genes cause human Severe Combined Immunodeficiency (SCID).
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D016511 · MeSH 2026。
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