Subject
- Plague285
- Vaccination257
- Cholera220
- Leprosy83
- Smallpox82
- Quarantine70
- Cinchona63
- Sexually transmitted diseases62
- Prostitution49
- Snake Bites42
- Shipping regulations41
- Quinine39
- Malaria38
- Cinchona alkaloids37
- Sanitation35
- Medical education29
- Medical legislation29
- Embassies and consulates25
- Muslim pilgrims and pilgrimages25
- Pilgrimages23