Approximately what percentage of hospitalized patients may develop a nosocomial infection?

Approximately what percentage of hospitalized patients may develop a nosocomial infection?
 
  A. 0
  B. 5
  C. 20
  D. 70

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Schistosomiasis has increased in areas where
 
  A. snails have become a delicacy.
  B. crayfish are eaten.
  C. dams have been built.
  D. swamps have been drained.

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A new serotype of Vibrio cholerae, V. cholerae 0139, has picked up the ability to produce
 
  A. pili.
  B. flagella.
  C. capsules.
  D. toxin.

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So far, the only disease that has been globally eradicated is
 
  A.
  polio.
 
  B.
  smallpox.
 
  C.
  measles.
 
  D.
  diphtheria.

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The World Health Organization (WHO) is part of the
 
  A. Food and Drug Administration.
  B. Department of Health and Human Services.
  C. Department of Human Resources.
  D. United Nations.
  E. North Atlantic Treaty Organization (NATO).