But you can't always do that. But there's an organization that has been able to find a way to learn when the first cases occur, and that is called GPHIN; it's the Global Public Health Information Network.
但不能每次都做到，但是有 一个组织 他们却做到了在每一次有新个案出现的时候都知道这些个案 它就是GPHIN 全称是“全球公共健康信息网”