In these days before antiseptics, doctors themselves....

“ In these days before antiseptics, doctors themselves also suffered high mortality rates. Florence Nightingale, a nurse during the Crimean War (1853-1856), watched one particularly inept surgeon cut both himself and, somehow, a bystander while blundering about during an amputation. Both men contracted an infection and died, as did the patient. Nightingale commented that it was the only surgery she'd ever seen with 300 percent mortality. ”

Sam Kean

From : The Tale of the Dueling Neurosurgeons: The History of the Human Brain as Revealed by True Stories of Trauma