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Dear Class,As we finish off week three & go into week four please remember that the Mid-Term exam is coming up. Please go back & review content from the previous weeks:Week One – DefinitionsEpidemiology– Greek words epi, meaning on or upon; demos, meaning people, & logos, meaning the study of. Epidemiology is the study of the distribution & determinants of health-related states or events in specified populations & the application of this study to the control of health problems. Disease surveillance– The principal notification system in the United Sates is the National Notifiable Disease Surveillance System (NNDSS). This is state & local vital data for monitoring deaths from certain infectious diseases (influenza & aids). Surveillance for chronic disease usually relies upon health care related data (hospital discharge, surveys, mortality data from vital statistics). Tracks both active & passive diseases. Identifies stages of the disease within an individual & the populations, measures of incidence, attack rate, prevalence, mortality rates, case-fatality rates & years of potential life lost. Endemic – A disease or condition regularly found among particular people or in a certain area. “Malaria is an endemic”Epidemic– A widespread occurrence of an infectious disease in a community at a particular time. “a flu is epidemic”P&emic– Of a disease prevalent over a whole country or the world. An outbreak of a p&emic disease.Common vehicle– Refers to agents transmitted by a common inanimate vehicle (food), with multiple cases resulting from such exposure.