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Question

A condition that occurs when the immune system mistakenly attacks and destroys healthy body tissue is called

A
auto-immunity
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B
immunization
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C
allergy
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D
immunodeficiency
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Solution

The correct option is A auto-immunity
Autoimmunity refers to the inability of the immune system to recognize its own tissues and cells as “self”. Immune responses are launched against these cells and tissues.

Immunisation can be defined as the process by which a person is made resistant to a particular disease by the administration of a vaccine. The principle is that the body starts to produce antibodies against it upon administration of the vaccine so that the person is safe from disease if he/she encounters the pathogen in future.

Allergies are reactions which are brought about when the immune system reacts to foreign substances in the environment.

Immunodeficiency is a state in which the immune system's ability to fight diseases is compromised or entirely absent.

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