Question

What leads to long-term immunity in mammals?

A. Exposure to an antigen
B. Action of an antibody
C. Barriers

Answer 1

Exposure to an antigen leads to long-term immunity in mammals.

Answer 2

This is how the vaccines work !

Answer 3

got it ?

Answer 4

thanks! why are you so smart? and yes

Answer 5

\(\color{green}{\huge\ddot\smile}\)