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- World War, 1939-194584
- Public health50
- Prevention42
- Children40
- Nutrition38
- Sick persons33
- Health education25
- Sexually transmitted diseases23
- Soldiers23
- Health and hygiene21
- Communicable diseases18
- School children18
- Physicians17
- Health literacy16
- Medicine, Military16
- Food supply15
- Leprosy15
- Medicine, Preventive15
- Nurses15
- Syphilis13