The treatment of snake-bite by antivenom is an example of
Artificially acquired active immunity
Artificially acquired passive immunity
Naturally acquired passive immunity
Specific natural immunity
In the life cycle of Plasmodium, sexual stages (gametocytes) begin to develop in
Give scientific reasons : Hepatitis $B$ and Bird flu $DNA$ vaccines are called Recombinant $DNA$ vaccines.
Main barrier which prevents the entry of disease's causing organism in our body is
Which one of the following antimicrobial drugs is suitable for treatment of both tuberculosis and leprosy?