Changes

=Immune Tolerance=

=Immune Tolerance=

Immunological tolerance is the state of unresponsiveness towards particular antigens, whereby immune responses are prevented or suppressed. Tolerance is required to prevent:

Immunological tolerance occurs when there is an unresponsiveness towards particular antigens, so any further immune responses are prevented or suppressed. Tolerance is required to prevent:

* Potentially harmful inflammatory responses towards innocuous substances, such as air-borne or food antigens

* Potentially harmful inflammatory responses towards innocuous substances, such as air-borne or food molecules

* To prevent an immune attack against host tissue- described as '''self-tolerance'''

* To prevent an immune attack against host tissue - this is known as '''self-tolerance'''

==T Cell Tolerance==

==T Cell Tolerance==