For the physical harming, Nassim N. Taleb wrote a book called "Anti-Fragile" desribing the concept of iatrogenic illness. https://en.wiktionary.org/wiki/iatrogenic An alarming fact was less dying patients when an hospital workers were in a strike action (during 2 weeks).
Johns Hopkins study suggests medical errors are third-leading cause of death in U.S. https://hub.jhu.edu/2016/05/03/medical-errors-third-leading-...
"The researchers caution that most medical errors aren't due to inherently bad doctors, and that reporting these errors shouldn't be addressed by punishment or legal action. Rather, they say, most errors represent systemic problems, including poorly coordinated care, fragmented insurance networks, the absence or underuse of safety nets, and other protocols, in addition to unwarranted variation in physician practice patterns that lack accountability."
I've seen this statistic before and had not looked into in much but it sounds like determining if docs cause more harm than good is perhaps a little more nuanced than the statistic first seems.
On a related note, below I've linked to an NPR article about how women that gave birth under the care of a doctor in the 1800s were 5 times more likely to die than those seen by a midwife because doctors were not washing there hands or medical interments.
https://www.npr.org/sections/health-shots/2015/01/12/3756639...