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What is Epidemiology?
Investigation of Epidemics
Concept of Causality
11 other sections not shown
age group age specific animals Arafat arthropod association attack rate attributed average duration biological breast cancer causal cause cervical cancer characteristic chronic diseases cigarette smoking clinical common vehicle compared confounding factor coronary heart disease crude rates death rates dentists developing difference disease process distribution of diseases environmental factors epidemic epidemiologic methods epidemiology estimate etiologic exposure females fever fomites frequency genetic gross agreement host Illustration immunity incubation period individuals infection infectious and chronic infectious diseases instance investigation King Saud University leukemia live births lung cancer males measles measures mortality rates null hypothesis occupations occur onset of illness oral polio outbreak persons pharmacists Polio population pyramids prevalence prevention prospective study Radiologist relative risk result retrospective study risk factor sample Saudi Arabia screening test shows social class statistical susceptible Table tion Total transmission Tuberculosis twins vaccine variable variations vector X X X