From carlzimmer https://twitter.com/carlzimmer on Twitter: Thanks to @JadAbumrad & the @Radiolab team for letting me help tell the story of Ignaz Semmelweis, the first person to say CLEAN YOUR HANDS. #covid19 https://www.wnycstudios.org/podcasts/radiolab/articles/dispatch-2-every-day-ignaz-semmelweis-day https://twitter.com/carlzimmer/status/1245333875737444352/photo/1 https://chirp.cooleysekula.net/attachment/64360