Immunity
Biology: Cambridge International A Level, topic 11.2.3
Active and Passive Immunity
Immunity can be provided in an active or a passive way. Active and passive immunity can also be artificial or natural. The different types of immunity are:
Active immunity
- Active immunity is where the immune system has created its own antibodies.
- Active immunity can be:
- Natural (antibodies have been created in response to catching a disease).
- Artificial (antibodies have been created in response to vaccination of antigens).
Passive immunity
- Passive immunity is where an individual receives antibodies from an external source. The antibodies are not made by the individual.
- Passive immunity can be:
- Natural (antibodies are transferred to a baby from its mother in breast milk).
- Artificial (antibodies are transferred to an individual by injection).
Test yourself on Immunity
What type of immunity is the transfer of antibodies to a baby from its mother in breast milk?