大多数研究人员假设一些自免疫反应仍在进行之中，这些反应不仅源自一个人自身的抵抗力，而且更是源自身体的神经组织。
Most researchers assume some kind of autoimmune response, in which a person's own defense system attacks rather than ignores the body's own tissues, is at work.
身体免疫系统的衰弱和自身提抗力的无效是患病的主要原因。
The body's weakened immune system and its inability to stave off infections are to blame.
它在医药上主要用于压制免疫系统，如果随便使用的话，可能会让使用者对严重传染病缺乏抵抗力。
Its main medical use is to suppress the immune system, so anyone consuming it casually would open himself to serious infection.
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