$A$ : 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.

Thymus is the site for the development and maturation of

$A$ – The vaccines generate memory – $B$ and $T$ – cells. $R$ – In vaccination activated pathogens are introduced into the body.

Acquired Immunity mediated by which of the following

Transplantation of tissues/organs fails often due to non­acceptance by the patient’s body. Which type of immune response is responsible for such rejections?