Descriptive Studies
Correlational, or Ecological Studies
Etiological, or Analytical Studies

Types of Epidemiological Studies

In epidemiology, prevalence is the proportion of a particular population found to be affected by a medical condition at a specific time.

Prevalence

Fixed population: a population whose membership is permanent.The population of Hiroshima, Japan, during an atomic bomb explosion in WWII
Dynamic or open population: membership of this population is defined by a changeable state or condition (resident of Boston)
Steady-state: the number exerting a population is equal to the number leaving (University students)


Defining the population

Principles of Epidemiology. (n.d.). United States Center for Disease Control. Retrieved July 19, 2020, from https://www.cdc.gov/csels/dsepd/ss1978/lesson6/section2.html

University of California, Davis

- Principals of Epidemiology
- Considerations for Election Polling Locations and Voters

References for Politics, Policy and the COVID-19 pandemic from United States Center for Disease Control

Principles of Epidemiology

United States Center for Disease Control. (2020, April 30). Communities, Schools, Workplaces, & Event. Retrieved from https://www.cdc.gov/coronavirus/2019-ncov/community/election-polling-locations.html

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