Abstract
Immune system is a network of biological structure and processes that does a remarkable job of defending the body against foreign invaders and any kind of impairment in its development or functioning leads to various disorders and dysfunctions. Researchers are going on the modulation or alteration of immune system network to repair or regain the functionality of immune system. Immunomodulation is a part of Immunotherapy that alters the immune response. This either potentiates or suppresses the response of immune system. Recently various side effects from chemical or synthetic therapeutics came into visibility, therefore more emphasis is on the use of herbals as immunomodulatory objects as they rarely effect the in vivo environment and chances of side effects are least. Immunostimulating and immunosuppressing plant extracts have their own importance and till date many plants have been investigated for their immunomodulating properties. Searches have been going on for better agents with such activities are becoming the field of interest all over the world.
