PH 520 Epidemiology I: Basic PrinciplesHOMEWORK 1: CHAPTERS 1-2CHAPTER 1 STUDY QUESTIONS:The definition of epidemiology includes the terms “distribution” and “determinants.” Describe the meaning of these terms.Define the following terms: (a) Epidemic, (b) Endemic, (c) PandemicEpidemiology involves the study of more than just infectious diseases. Explain.Distinguish between the descriptive and analytic approaches to epidemiology.Describe the chain of infection.List four types of epidemiologic information useful for influencing public health policy and for planning individual health decisions.Define “efficacy” and “effectiveness,” note their difference, and provide examples of both.In what ways does epidemiology play a foundational role in public health?Define the following “epidemic” terms and give an example of each: (a) Common source, (b) Propagated, (c) MixedDefine the following “case” terms and give an example of each: (a) Primary, (b) Index, (c) Secondary, (d) Suspect, (e) Case severityDefine each of the following “disease transmission” terms and give an example of each: (a) Vector, (b) Fomite, (c) Carriers (active, convalescent, passive, incubatory, intermittent), (d) ZoonosisDifferentiate between direct and indirect transmission. Describe each of the following types of indirect transmission: (a) Airborne, (b) Vector-borne, (c) Vehicle-borne. Provide an example of