• 84 Health
• 42 Sociology
• 27 Social institutions
• 19 Diseases
• 12 Medical care surveys
• 11 Communicable diseases
• 11 Health facilities
• 11 Social systems
• 10 Medical care
• 9 History
• 9 Medicine, Preventive
• 9 Research
• 9 World history
• 8 Diagnosis
• 7 International relations
• 7 Latin America
• 7 Latin Americans
• 7 Social change
• 7 World politics
• 6 Public health
• 5 Drug utilization
• 5 Drugs
• 5 Equality
• 5 Health care reform
• 5 Public health laws

• 144 English

• 17 Africa
• 14 Africa, Sub-Saharan
• 7 Asia
• 7 Middle East
• 4 South Asia
• 3 Africa, North
• 3 Southeast Asia
• 2 Europe

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