Colostrum is the first milk produced by the mammary glands immediately after childbirth. It contains antibodies, primarily Immunoglobulin A (IgA), which are transferred to the newborn. This transfer of ready-made antibodies provides passive immunity to the infant,protecting them against infections during the initial days of life.
(d) How is active immunity different from passive immunity?
(c) The organ transplants are often rejected if not taken from suitable compatible persons. [(i)] Mention the characteristic of our immune system that is responsible for the graft rejection. [(ii)] Name the type of immune response and the cell involved in it.