A Cure for Wellness
historytoday.com
historytoday.com
https://en.wikipedia.org/wiki/William_Harvey#De_Motu_Cordis / https://en.wikipedia.org/wiki/Exercitatio_Anatomica_de_Motu_...
I found a paper by some medical historians that said medicine became useful between 1910 and 1912: where a random person going to a random doctor with a random condition was more likely to be helped than harmed.