Semmelweiss was a Hungarian physician who pioneered the use of antiseptics in obstetrical clinics. While working at a Vienna hospital, he became convinced that physicians were transmitting puerperal fever, also called childbed fever, to patients and began insisting that doctors thoroughly cleanse their hands. Though this greatly reduced the mortality rate from infection in childbirth, he was widely ridiculed by his colleagues and left Vienna. When was the value of his work finally recognized? Discuss