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Epidemiologists (Six Causes of Epidemics (Ecological Changes (Defintion:…

- - - - Definition: Study a group of infected by asking if exposure was at a specific time
      - Advantage: Quick and less expensive
      - Disadvantage: Some Data may falsely link the exposure
    - - Definition: Study groups of infected and not infected.
      - Advantage: Quick and less expensive
      - Disadvantage: Less accurate due to memory loss
    - - Definition: Study of everyday life to see infection
      - Advangate: More accurate date.
      - Disadvantage: Expensive