Active immunity is

Read the following statements :- (A) Passive immunity serves no purpose in immunodeficient host. (B) Active immunity is used for the treatment of infections. (C) Active immunity develops after a lag period. (D) Passive immunity is conferred by introduction of antigen in the body. How many of the above statements are false ?

Active immunity was stared by :

Active immunity development is related to

Active immunity development is related to

Active immunity means