epidemiology Epidemiology 54 prevention & control 38 Acquired Immunodeficiency Syndrome 18 Prevention 17 Neoplasms 16 etiology 16 more ... Epidemiologic methods 15 Communicable diseases 14 AIDS (Disease) 13 Communicable Diseases 12 Cancer 10 Disease Outbreaks 10 therapy 10 HIV Infections 9 pathogenicity 9 Diseases 8 HIV infections 8 Zoonoses 8 diagnosis 8 history 8 statistics & numerical data 7 Chronic Disease 6 Communicable Disease Control 6 Influenza, Human 6 Mental Disorders 6 Occupational Diseases 6 Prevention & control 6 Risk Factors 6 methods 6 less ...