$B$-cells are lymphocytes which produce the humoral immunity. These cells are produced by
Liver
Spleen
Thymus
Bone marrow
Immune activities defence mechanism for different diseases is known as
The function of vaccine is the production and storage of
Which of the following immune responses is responsible for rejection of kidney graft?
Why is an antibody molecule represented as $H_2I_2$ ?
What are pathogens ?