Analytic Study Design (n.d.). Retrieved on 10/1/13 fromhttp://www.epidemiolog.net/evolving/AnalyticStudyDesigns.pdf Optional Reading Aschengrau A, Seage GR (2003). Chapter 6: Overview of Epidemiologic Study Designs. Essentials of Epidemiology in Public Health, Boston: Jones & Bartlett Publishers. Retrieved on 10/1/13 from http://publichealth.jbpub.com/aschengrau/Aschengrau06.pdf Cosio G (2005). Epidemiological Overview of Tuberculosis [Presentation]. Retrieved on 10/1/13 fromwww.paho.org/cdmedia/dpccd01/Presentations/Day1/EPIDEMIOLOGICAL%20OVERVIEW%20OF%20TUBERCULOSIS%202.ppt DS 2-3 pages Times new roman 12 pt Be sure to provide in-text citation(s) and a reference list to support your viewpoints. Please use at least three (3) research sources (not Wikipedia, or fact sheets). Please do so in ALL subsequent submissions. You are a Health Officer for a rural county health department and have been assigned to study the frequency of an infectious disease such as tuberculosis or HIV/AIDS. Write an essay in which you do the following: 1. Describe observational and experimental epidemiology as the two (2) study designs apply to either of the diseases you have chosen. Be sure to identify differences between these two types of analytic epidemiology. 2. Under what conditions will you conduct a case-control study as opposed to a cohort study?