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Desiree Mann Desiree Mann
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Posts: 794
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6 years ago
Infection with the chickenpox virus produces lifelong immunity. This type of immunity is called
 
  1. Acquired immunity.
  2. Active immunity.
  3. Natural immunity.
  4. Passive immunity.
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6 years ago
ANS: 2
Desiree M. Author
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6 years ago
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