收集关于全球健康的数据本是一个不完美的过程：工作人员徒步穿过村庄去挨家挨户敲门问问题，在纸质表格上写下答案，然后输入数据——然后从这满是漏洞的信息中，各个国家做出重大的决策。数据极客约尔·塞拉尼科谈论了在过去几十年来关于收集医疗健康数据的质的改变——从掌上电脑到Hotmail，现在又转移到云端。（影片拍摄于TEDx奥斯丁）

令人惊讶的医疗保健大数据革新开端

For decades, global health relied on paper forms and manual data entry, leaving critical questions about disease, medicine, and even child mortality largely unanswered. In many countries, knowing how many children have been vaccinated requires months or years of door-to-door surveys, with stacks of forms often never processed. By harnessing cloud technology and simple mobile phones, data collection now happens in real time, empowering health workers to make informed decisions instantly. This shift shrinks timelines from years to minutes, turning scattered guesses into actionable knowledge.