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- Sexually transmitted diseases 79
- World War, 1939-1945 68
- Children 60
- Nutrition 50
- Health and hygiene—Taiwan 49
- Health and hygiene—children 47
- Patent medicines 44
- Health education 33
- Syphilis 30
- Health and hygiene—China 28
- Pregnancy 28
- Prenatal care 25
- World War, 1914-1918 23
- AIDS (Disease) 21
- Tuberculosis 21
- Smoking 20
- China 18
- Infection—Prevention 17
- Leprosy 17
- Flies as carriers of disease 15