Question

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

Answer 1

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.