But Creutzfeldt-Jakob disease (CJD), to give its proper name, is still a nasty illness that humanity would be better off without.

这种严重性情的疾病的准确名称叫克雅氏病（CJD），治疗起来仍然棘手。

Experts don't yet know what causes CJD, nor do they really know how to look for it.

专家们还不知道导致 CJD 的原因，也不知道如何寻找它。

CJD and a handful of similar neurological conditions are caused by the misfolding of a particular protein that is found in the membranes of certain nerve cells.

该病似的一些神经症状是由于某种神经细胞的细胞膜上的一个特殊蛋白发生错误折叠所致。