Sent_en: 2zh The immune system has apparently evolved to be mildly inefficient so that it achieves a balance between quick response to disease and decreased probability of autoimmune disease, a condition in which the immune system attacks healthy tissue.
Sent_yy: 免疫系统显然已经进化到轻度低效，因此它在对疾病的快速反应和自身免疫性疾病，一种免疫系统攻击健康组织的疾病的可能性降低之间达到了平衡。