Over the past several years, researchers have begun to unravel the mysteries of how dendritic cells educate the immune system about what belongs in the body and what is foreign and potentially dangerous.

• 过去几年内，研究人员已逐渐解开谜团，知道树突细胞如何教导免疫系统，分辨哪些是我们身体自己的，哪些又是外来、可能有危险的。