Question

what type of immunity is long term?
a active
b passive
c innate

Explanation:

To determine the long - term immunity type, we analyze each option:

• Option a: Active immunity is acquired when the body's immune system is exposed to an antigen (either through infection or vaccination) and produces memory cells. These memory cells can provide long - term protection as they "remember" the antigen, allowing for a quicker and more effective response if the same antigen is encountered again in the future.
• Option b: Passive immunity involves receiving pre - formed antibodies (for example, from a mother to her baby through the placenta or breast milk, or through an injection of antibodies). Since the body does not produce its own memory cells in this case, passive immunity is short - lived.
• Option c: Innate immunity is the body's non - specific, first - line defense system (like skin, mucus, and certain immune cells). It is present from birth and does not provide long - term, antigen - specific immunity in the same way as active immunity.

Answer:

a. Active