The function of vaccine is the production and storage of
Antigens
Immune bodies
Immune reactions
Antibodies
$MALT$ constitutes about _______ percent of the lymphoid tissue in human body.
Thymus is the site for the development and maturation of
Given below are two statements :
Statement $I$ : Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced.
Statement $II$ : Both bone marrow and thymus provide micro environments for the development and maturation of T-lymphocytes.
In the light of above statements, choose the most appropriate answer from the options given below :
The term ’active immunity' means
What are pathogens ?