The Covid-19 still rages in China, at the same time, various staff stay on the job. During this pandemic, the most frequent word we heard from Weibo, WeChat and TV, is Public health. Considering the pandemic, graduates and alumni come from Harvard University (ranked as 2nd in Public Health realm), John Hopkins University (ranked as 1st in Public Health realm), University of Washington, Tulane University, these four universities with high fame in the globe, volunteered to set up this seminar. We hope to talk about the Public Health major with you stay at another side of the screen.