Paper I
2024 December (Supplementary) (2019 Scheme) · 100 marks · 180 min

Question

A: Window period in HIV infection is from entry of virus to appearance of symptoms. R: Guidelines for HIV testing in India have been laid down by National AIDS Control Organisation.

  • a) Both A and R are true, and R is the correct explanation of A
  • c) A is true but R is false
  • b) Both A and R are true, and R is not the correct explanation of A
  • d) A is false but R is true
Qxix1 marksMCQs

Answer

- [x] d) A is false but R is true

Assertion is false: the window period in HIV infection is correctly defined as the interval between entry of the virus and the point at which a given diagnostic test becomes capable of reliably detecting the infection (i.e., detectable markers — HIV RNA, p24 antigen, or antibody — appearing at levels sufficient for the test to register positive) — NOT the interval to the appearance of clinical symptoms. Many individuals remain entirely asymptomatic well beyond the window period, and symptom onset is not the defining endpoint of this concept. Reason is true: NACO (National AIDS Control Organisation) has indeed laid down the official guidelines/testing strategies (Strategy I, II, and III) for HIV testing in India, governing donor screening, surveillance, and individual diagnosis respectively. Since the Assertion is false and the Reason is an independently true, correct statement (though it does not explain the false assertion), the correct option is that A is false but R is true.

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