Colostrum, the yellowish fluid, secreted by mother during the Inittlal days of lactation is very essentlal to impart immunity to the newbom infants because it contains
Natural killer cells
Monocytes
Macrophages
Immunoglobulin $A$
Spleen is
Some people who have suffered from a disease may not be affected again during their life time; such immunity is called
Definitions / Explanation : $B$-lymphocytes & $T$-lymphocytes
A condition that occurs when the immune system mistakenly attacks and destroys healthy body tissue is called
Why is an antibody molecule represented as $H_2I_2$ ?