An 'antigen' is
Which of the following cells are associated with immune system of body
Immune activities defence mechanism for different diseases is known as
$A$ : Colostrum is a very efficient means of transferring immunity to a newborn.
$R$ : IgM from mother’s milk protects the baby from the respiratory infection usually affecting in young age.
When an organ is transplanted and is rejected by the body, the lymphocytes are produced by