In the series, Mary "Typhoid Mary" Mallon is depicted as redheaded and overweight, when in reality she was a slim brunette who was actually very attractive.
"Zinberg's "Intrascope" is really an endoscope and allowed surgeons to take a peek inside the human body. The first effective open-tube endoscope was developed in 1853 by Desormeaux. This instrument was used to examine the urethra and the bladder."