The correct statement about active immunity is:
A
It provides immediate relief
B
It cross the placental barrier
C
It is long lasting immunity with no side effects
D
ATS is used for active immunisation
Correct option is B. It is long lasting immunity with no side effects
Active immunity is the antibody response produced by the body when exposed to pathogens, vaccines etc. It is a long-lasting immunity and has no side effects as these are WBCs produced by the body.
So, the correct answer is 'it is long-lasting immunity with no side effects'.