Q.Write a note on 'artificial acquired active immunity'.

Artificial acquired active immunity is the long-lasting immunity that develops when a vaccine (containing a weakened, killed, or inactivated pathogen/antigen) is deliberately introduced into the body, stimulating the...

Vaccination triggers the body's own immune system to make antibodies, giving long-term, self-generated protection.

Immunity that is 'acquired' arises after exposure to a specific antigen, and it is called 'active' when the individual's own immune system actively produces the antibodies (as opposed to 'passive' immunity, where ready-made antibodies are simply transferred from another source). When this active response is deliberately induced through medical intervention — by administering a vaccine containing an attenuated (weakened), killed, or inactivated form of a pathogen, or a harmless fragment of it (antigen) — it is termed artificial acquired active immunity. The vaccine antigen stimulates B-lymphocytes to produce specific antibodies and generates long-lived memory cells, without the individual actually suffering from the full-blown disease. Because memory cells persist, the body can mount a rapid, strong secondary …