It is the study of Immune system.

Hypersensitive Reactions

Definition: Hypersensitive reactions are inflammatory reactions within the humoral or cell mediated branches of the immune system that lead to extensive tissue damage or even death. The four types of hypersensitive reactions (Gell and Coombs classification) generate characteristic  effector molecules and clinical manifestations Type I Hypersensitive Reaction It is mediated by IgE antibodies whose Fc …

Hypersensitive Reactions Read More »


The mechanism used by the body as protection against environmental agents that foreign to the body. Immunity is a state of protection against foreign pathogens or substances (antigens). It responds to threats on an individual basis. Term immunity derived from – Immunis, meaning Exempt. Immune system is remarkably versatile defense system that has evolved to …

Immunity Read More »