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HSC BIOLOGY 2 UNIT ASSESMENT TASK WEIGHING 20% SECTION 2: EPIDEMIOLOGY Epidemiology is the study of the demographics of disease processes, including the study of epidemics and other diseases that are common enough to allow statistical tools to be applied. It is an important supporting branch of medicine, helping to find the causes of diseases and ways of prevention. It can, using statistical methods such as large-scale population studies, prove or disprove treatment hypotheses. Another major use of epidemiology is to identify risk factors for diseases. Epidemiological studies generally focus on large groups of people and relate to a target population that can be identified. This allows statistics to be used to recognize trends and possible causal factors. The three major epidemiologic techniques are descriptive, analytic, and experimental. While all three can be used in the investigation of disease occurrence, the method used most is descriptive epidemiology. Once the basic epidemiology of...

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