Show Menu

Immunology Cheat Sheet (DRAFT) by

About the basic definitions in Immunology.

This is a draft cheat sheet. It is a work in progress and is not finished yet.


Immunology is a branch of biology which deals with the study of body's defense against infection. Immunology is relatively a new science and its origin is attributed to Edward Jenner.
The term immunology is coined by Russian biologist Ilya Ilyich Mechnikov


The overall ability of the host to fight the disease causing organisms conferred by the immune system is called immunity.
Immunity is of two types:
1. Innate immunity or Natural immunity or Non-sp­ecific immunity
2. Acquired immunity or Specific immunity

Immune system

A set of organs and processes of the body that provides resistance to infections and toxins.
example: Bone marrow, thymus and lymph nodes.

Innate Immunity

Innate immunity is a non-sp­ecific type (it responds to many antigens i.e. it is not confined to attack a single antigen) of defence. It is accomp­lished by providing different types of barriers to the entry of the foreign agents into our body.