Home | | Medical Physiology | Passive Immunity

Chapter: Medical Physiology: Resistance of the Body to Infection: II. Immunity and Allergy

| Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail |

Passive Immunity

hat is, the person’s own body develops either antibodies or activated T cells in response to invasion of the body by a foreign antigen.

Passive Immunity

Thus far, all the acquired immunity we have discussed has been active immunity. That is, the person’s own body develops either antibodies or activated T cells in response to invasion of the body by a foreign antigen. However, temporary immunity can be achieved in a person without injecting any antigen. This is done by infusing antibodies, activated T cells, or both obtained from the blood of someone else or from some other animal that has been actively immunized against the antigen.

Antibodies last in the body of the recipient for 2 to 3 weeks, and during that time, the person is protected against the invading disease. Activated T cells last for a few weeks if transfused from another person but only for a few hours to a few days if transfused from an animal. Such transfusion of antibodies or T lymphocytes to confer immunity is called passiveimmunity.


Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail


Copyright © 2018-2020 BrainKart.com; All Rights Reserved. Developed by Therithal info, Chennai.