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Text File  |  1999-11-09  |  309b  |  10 lines
  1. Which is the type of immunity produced by antigens that are introduced through an infection or by contact? A
  2. naturally acquired active immunity
  3. artificially acquired active immunity
  4. naturally acquired passive immunity
  5. artificially acquired passive immunity
  6. none of the above
  7.  
  8. [#FRAME:"TRM4S9A"]
  9. NONE
  10.