Which of the following diseases gives life-long immunity after an attack?

Typhoid

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Mumps

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Tetanus

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Diphtheria

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Solution

The correct option is B Mumps
Autoimmunity is the system of immune response of an organism against it's own cell. If a person is once attacked by the mumps disease, the cells of his body become immunized against this disease. So, in the future when the disease attacks him again, it will not affect him.

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