Passive Immunity & Active Immunity

Passive Immunity is the process where pre-made antibodies are transferred to a person, instead of having them exposed to pathogens and trigger own immune response.

• Naturally Acquired: Foetus through mother's blood, or infants through mother's breast milk.
• Artificially Acquired: Medical injections of antibodies.

Active Immunity is the process where a person is exposed to pathogens and its immune system response by producing antibodies and immune cells.

• Naturally Acquired: Antibody developed by immune system after exposure to pathogen.
• Artificially Acquired: Vaccination, stimulates active immune response and produce antibodies as well.