Innate or Genetic Immunity: Immunity an organism is born with.
Genetically determined.
May be due to lack of receptors or other molecules required for infection.
Innate human immunity to canine distemper.
Immunity of mice to poliovirus
Acquired Immunity:Immunity that an organism develops during lifetime.
Not genetically determined.
May be acquired naturally or artificially.
Development of immunity to measles in response to infection or vaccination.
I. Naturally Acquired Immunity: Obtained in the course of daily life.
A. Acquired Active Immunity:
Antigens or pathogens enter body naturally.
Body generates an immune response to antigens.
Immunity may be lifelong (chickenpox or mumps) or temporary (influenza or intestinal infections).
B.Acquired Passive Immunity:
Antibodies pass from mother to fetus via placenta or breast feeding (colostrum).
No immune response to antigens.
Immunity is usually short-lived (weeks to months).
Protection until child’s immune system develops
II.Artificially Acquired Immunity: Obtained by receiving a vaccine or immune serum.
A.Artificially Acquired Active Immunity:
Antigens are introduced in vaccines (immunization).
Body generates an immune response to antigens.
Immunity can be lifelong (oral polio vaccine) or temporary
(tetanus toxoid).