A primary response to infection in the mammalian immune system
A) occurs on contact with a virus after immunisation.
B) happens once in the lifetime of an animal.
C) is not 'remembered' by the immune system.
D) occurs after first exposure to an antigen.
E) involves the complement cascade.

Question

Quizplus · Accepted Answer

The primary response in the mammalian immune system is triggered after the first exposure to an antigen, leading to the activation and proliferation of immune cells specific to that antigen.

A Primary Response to Infection in the Mammalian Immune System