Select the correct statement with respect to diseases and immunisation

Options

A. injection of snake antivenon against snake bite is an example of active immunisation.
B. It due to some reason B-and T-lymphocytes are damaged , the body will not produce antibodies against a pathogen.
C. Injection of dead/ inactivated pathogens causes passive immunity.
D. Certain protozeoans have been used to mass produce hepatitis B vaccine.

Answer

B