Question

immunization is an artificial way of causing active immunity but what is an example of active immunity happening naturally?
a getting a disease and recovering.
b a fetus receiving mothers blood.
c dying from a disease.

Explanation:

To determine the example of natural active immunity, we analyze each option:

• Option a: When a person gets a disease and recovers, their immune system is exposed to the pathogen (antigens), mounts an immune response (produces antibodies and memory cells), and this is natural active immunity as the body actively responds to a natural infection.
• Option b: A fetus receiving the mother’s blood involves passive immunity (transfer of antibodies from mother to fetus, no active immune response by the fetus’s own system).
• Option c: Dying from a disease means the immune system failed to mount an effective response, so it is not an example of active immunity.

Answer:

a. Getting a disease and recovering.