The relevant section:
It's been a long struggle. About 1840, Hungarian obstetrician Ignaz Semmelweis acted on a hunch and ordered his medical students to wash their hands with chlorinated lime before examining mothers-to-be.
The maternal death rate dropped from 12 percent to 1 percent within two years. His findings triggered such a backlash from colleagues that he resigned and eventually died, of a hospital-acquired infection, in a mental hospital after suffering a nervous breakdown.