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Home Q & A Board Biology-Related Homework Help Cell Biology
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seterria seterria
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6 years ago
If the number of people who become ill during an epidemic rises and falls rapidly, this is called a(n)
 
  A. propagated epidemic.
  B. promulgated epidemic.
  C. common source epidemic.
  D. index epidemic.


The first identified case in an outbreak is called the
 
  A. starter case.
  B. traceable case.
  C. primary case.
  D. index case.


The type of epidemiological study that determines the characteristics of the persons involved and the time and place of the outbreak is called a(n)
 
  A. inspection study.
  B. descriptive study.
  C. cohortive study.
  D. retrospective study.


The immunity of some black Africans to malaria is probably due to their
 
  A. general health.
  B. cultural practices.
  C. age.
  D. genetic background.


When an infectious disease cannot spread in a population because it lacks a significant number of susceptible hosts, the phenomenon is referred to as
 
  A. protected population.
  B. active immunity.
  C. passive immunity.
  D. herd immunity.
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Jdjewels1Jdjewels1
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seterria Author
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#2
6 years ago
thanks for your help
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