The lack of $B$-cells and $T$-cells is known as:

In active acquired immunity,.........

Which antibody is present in high concentration in the initial milk (colostrum)?

Consider the following four statements $(i-iv)$ regarding kidney transplantation and select the two correct ones.
$(i)$ Even if a kidney transplant is successful,the recipient needs to take immunosuppressants for a long time.
$(ii)$ Cell-mediated immune response is responsible for the rejection of the graft.
$(iii)$ $B$-lymphocytes are responsible for the rejection of the graft.
$(iv)$ The acceptance or rejection of a transplanted kidney depends on specific interferons.

Which cells are responsible for the production of immunoglobulins?

What does $PMNL$ stand for?