Write an essay in which you first clearly identify a single major achievement in Epidemiology Then briefly describe one important tool that is used to measure its occurrence in a population.

REQUIRED READING   Bonita, R., Beaglehole, R. & Kjellström, T. (2006). Chapter 1: What is epidemiology? In Basic epidemiology (2nd ed.). Retrieved from http://whqlibdoc.who.int/publications/2006/9241547073_eng.pdf   Bonita, R., Beaglehole, R. & Kjellström, T. (2006). Chapter 2: Measuring health and disease. In Basic epidemiology (2nd ed.). Retrieved from http://whqlibdoc.who.int/publications/2006/9241547073_eng.pdf   Burris, S. (2017). The legal infrastructure of public health [Video presentation]. Temple University […]