World health 6 World Health 5 epidemiology 5 statistics & numerical data 5 Statistics 3 AIDS (Disease) 2 Accidents 2 Acquired Immunodeficiency Syndrome 2 Causes 2 Communicable diseases 2 Cost of Illness 2 Death 2 Demography 2 Disease Outbreaks 2 Epidemiology 2 HIV Infections 2 HIV infections 2 Health status indicators 2 Life expectancy 2 Morbidity 2 Mortality 2 World Health Organization 2 Wounds and Injuries 2 Wounds and injuries 2 Cause of Death 1 Chronic Disease 1 Epidemiologic Methods 1 Health services - statistics 1 Health services statistics 1 Millennium development goals statistics 1