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Subject
- Hygiene21
- Public health21
- Sanitation[remove]21
- Malaria17
- Nursing14
- Tuberculosis13
- Yellow fever10
- Romania9
- Nutrition7
- Tropical medicine7
- Communicable diseases5
- Medical education5
- Venereal diseases5
- Epidemiology3
- Cholera2
- DDT (Insecticide)2
- Hookworm disease2
- Industrial hygiene2
- Infant -- Mortality2
- Medicine, Preventive2