chemical cures that attack bacteria in the body that is causing disease
Paul Erlich tested over 600 compounds but did not find a cure for syphilis
1909: Japense scientest, Hata, found a cure for syphilis, named it Salvarson 606
1932: Prontosil discovered which killed bacterial infections/blood poisoning
during WW2: M&B 693 was developed which cured pneumonia