Ignaz Semmelweis (1818-1865): Hungarian physician.
He claimed that the spread of childbed fever would be reduced if doctors washed their hands with chlorine after having visited a patient or having conducted an autopsy.
Semmelweis was, initially, fiercely criticised by the medical establishment of that time. However Pasteur’s insights into bacteria proved Semmelweis theories true.
Because of Semmelweis’ personal story, today ‘Semmelweis reflex’ refers to the tendency of rejecting new theories (even if evidence-based) if they collide with pre-established norms