Epidemiology : Redefining the Study among People

According to the World Health Organization, epidemiology is the study of the distribution and determinants of health-related states or events (including disease), and the application of this study to the control of diseases and other health problems. Various methods can be used to carry out epidemiological investigations: Surveillance and descriptive studies can be used to study distribution; analytical studies are used to study determinants, which is aimed to describe the distribution and magnitude of health and disease related problems in human populations, with an ultimate goal to eliminate or reduce the health problem or its consequences and promote the health and well-being of society as a whole. The current review will be to redefine the epidemiological tools which are used to do the studies among people.