Class 12 · Human Health and Diseases

Understanding AIDS: Acquired Immunity Deficiency — NEET Biology

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The word AIDS stands for Acquired Immuno Deficiency Syndrome. This means deficiency of immune system, acquired during the lifetime of an individual indicating that it is not a congenital disease. 'Syndrome' means a group of symptoms. AIDS was first reported in 1981 and in the last twenty-five years or so, it has spread all over the world killing more than 25 million persons.

NCERT Biology · Class 12 · Chapter 7 · Paragraph 49
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Which of the following statements are correct? I. AIDS was first reported in 1981. II. HIV is transmitted through blood transfusion. III. ELISA is used to directly detect HIV particles. IV. AIDS is curable if detected early.

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Correct answer: A I and II only

III is incorrect – ELISA detects antibodies, not virus. IV is incorrect – AIDS has no cure.

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What does NCERT say about word AIDS stands for?
The word AIDS stands for Acquired Immuno Deficiency Syndrome. This means deficiency of immune system, acquired during the lifetime of an individual indicating that it is not a congenital disease.
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Human Health and Diseases, Class 12 NCERT Biology.

Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.

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