Question

Differentiate between active acquired immunity and passive acquired immunity.

Answer 1

Aspect	Active Acquired Immunity	Passive Acquired Immunity
Source	In this type of immunity, the host’s own body produces antibodies and memory cells in response to an antigen.	In this case, the body does not produce its own antibodies but receives them directly from an external source.
How acquired	It is acquired through a natural infection or by receiving a vaccination.	It is acquired through maternal transfer (via the placenta or colostrum) or by injecting immune serums (like anti-venom).
Time to develop	This immunity is a slow process and takes some time to develop its full effective response.	It provides immediate protection to the body because preformed antibodies are introduced.
Duration of protection	The protection provided is long-lasting and, in many cases, lasts for a lifetime.	The effect is short-lived and temporary, as the antibodies eventually leave the system.
Memory cells	It leads to the formation of immune memory cells, which help in a faster response during future exposures.	There is no formation of memory cells in passive immunity.