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Epidemiologic-statistics-Impact-factor

Epidemiology is recognized both as the basic science of preventive medicine and as one which informs the process of public health policy. Several practical concepts have been proposed for epidemiology. The simplest is that epidemiology is the study of disease occurrence or other health-related characteristics in populations of humans and animals. Epidemiologists are not only studying disease frequency, but also whether the frequency differs across groups of people; i.e., they are studying the cause-effect relationship between exposure and illness. Diseases aren't happening at random; they have triggers that can be avoided — quite frequently caused by man. So, if the causes were known, a lot of diseases could be prevented. Epidemiology methods were critical in identifying many causative factors that, in turn, led to health policies designed to prevent disease , injury and premature death. Epidemiology is the natural research field that examines all of the factors affecting the occurrence or absence of diseases and disorders. That deals with the study of causes, distribution and disease control in populations. Much of the data collected by epidemiologists comes from self-reporting as a result of responses provided by study participants. Journal impact factor provides a quantitative evaluation tool for the grading, evaluation, sorting, and comparison of similar journals. 

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