皮肤曾被视为一种大体上被动的屏障，但《自然》不久前发表的两项研究[1,2]发现，皮肤其实能自己产生对抗感染的抗体。研究结果或为开发能涂在皮肤上的无针疫苗铺平道路。

The commensal bacteria or microbiota on our skin is thought to contribute to host health, protecting the host against a range of infections, including wound healing and anti-cancer properties. In this ...