Epidemiology is the method used to discover the causes of health effects and sicknesses in populations. In epidemiology, the affected person is the community and individuals are regarded collectively. By definition, epidemiology is the look at (scientific, systematic, and statistics-pushed) of the distribution (frequency, sample) and determinants (causes, threat elements) of fitness-related states and occasions (no longer just diseases) in unique populations (neighborhood, college, town, country, us of a, worldwide). It is likewise the software of this look anet to the control of fitness troubles