The immune system is complicated. Any successful attack on cancer cells involves a vast army of special immune chemicals and cells.

免疫系统很复杂。要想成功攻击癌症细胞，需要大批特殊的免疫物质和细胞参与其中。

It is an organ that actively releases hormones and immune system chemicals called cytokines that can increase your risk of developing chronic diseases, such as heart disease and insulin resistance.

它还是一种被叫做细胞因子的器官，功效就是释放荷尔蒙以及和免疫系统相关的化学物质。它会大大增加慢性疾病的患病几率，如心脏疾病和胰岛素抵抗。