- Vienna general hospital had 3 delivery rooms one staffed by female midwives and the other by medical students.
- Over 12% of women delivered by young doctors died of perpural fever. 3x as many from other delivery room.
- Semmelweis realised med students disectigng dead bodies then moving straight onto delivering a baby without washing hands.
- Thought med students may be carrying disease on hands from corpse to patient.
- A colleauge cut himself and died of…