Applied science is the application of scientific principles and findings to real-world problems. Engineering and medicine are only two examples of the many fields that fall under this umbrella term. Basic science, on the other hand, aims to advance scientific ideas and principles that explain and predict phenomena in the natural world. The two fields are often compared.
Epidemiology is an example of an applied science that uses formal science, such as statistics and probability theory. Using both biological and statistical methodologies, genetic epidemiology is an applied science.