Immunotoxicology is the investigation of harmfulness influencing the invulnerable framework. The poison actuated safe brokenness may appear as immunosuppression, sensitivity, autoimmunity, expanded vulnerability to malignant growth, or any number of provocative based illnesses or pathologies. Instances of specialists that can cause hypersensitivity type impacts to incorporate overwhelming metals, corrosive anhydrides, penicillin, and propylthiouracil. A few specialists that reason direct resistant danger incorporate dexamethasone, cyclosporin an, azathioprine, overwhelming metals, and air contamination. A specialist causing round about poisonous quality incorporates p, p’- DDE.