https://www.npr.org/sections/goatsandsoda/2020/03/11/814474930/coronavirus-covid-19-is-now-officially-a-pandemic-who-says
https://www.foxnews.com/health/who-declares-coronavirus-global-pandemic
https://www.wsj.com/articles/u-s-coronavirus-cases-top-1-000-11583917794
https://www.nbcnews.com/health/health-news/live-blog/coronavirus-updates-live-u-s-cases-top-1-000-spread-n1155241/ncrd1155646#liveBlogHeader
https://time.com/5791661/who-coronavirus-pandemic-declaration/
去搜一下吧。。太多了。