Elements of Immunity: Acquired Immunity
The resistance developed by man during his life is known as Acquired immunity or Adaptive immunity.
This is distinct from innate immunity in that it is due to specific antibodies or sensitized lymphocytes produces in response to specific antigens. Hence, this immunity is also known as specific immunity.
This acquired specific immunity is of two types namely Active and Passive.
Both active and passive immunity may be Natural or Artificial.