History, 20th Century history 551 History 451 History, 19th Century 195 History, 21st Century 105 Medicine 67 Health Policy 48 more ... Medical care 46 Public health 45 Public Health 44 Social aspects 39 Medical policy 38 prevention & control 36 Physicians 35 Politics 32 Delivery of Health Care 30 Psychiatry 26 Social conditions 26 Women 26 Health and hygiene 25 Research 25 therapy 24 legislation & jurisprudence 23 psychology 23 Government policy 22 Humanities 22 Mental Disorders 22 history (discipline) 22 humanities 22 Eugenics 21 less ...