1.

Write the difference between active acquired immunity and inactive acquired immunity.

Answer»

Active Immunity:

  • It develops in the blood when an antigen or germ enters into the body. Hence, it is also called humoral immunity.
  • It is a slow process but it acts for a long duration.
  • Natural active immunity is acquired by exposure of an organism to pathogens.
  • Artificial, active immunity is acquired through vaccination of inactivated pathogen or antigen.

Passive Immunity:

  • The immunity that an individual acquired by receiving antibodies or sensitized white blood cells from another immune individual is known as Passive immunity.
  • The protection, however, is temporary and usually less effective.
  • IgG antibodies can cross the placental barrier to reach the foetus. 
  • IgA antibodies are transferred from mother to child in the form of colostrum.


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