Which of the following is more virulent?
Correct answer: C. HIV-1
- A. HIV-2
- B. HIV-1(a)
- C. HIV-1
- D. HIV-2(a)
Explanation
HIV-2 is less virulent, has a slower disease progression, and is mostly confined to West Africa, with limited global spread. HIV-1(a), a subtype of HIV-1, is more virulent than HIV-2 and contributes significantly to worldwide infections, showing faster progression. HIV-2(a), a subtype of HIV-2, remains less virulent and follows the same pattern of slower transmission and disease development as HIV-2 in general. HIV-1, overall, is the most virulent type, responsible for the majority of HIV infections worldwide, with rapid progression to AIDS if untreated. Therefore, HIV-1 is considered more virulent than HIV-2.
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Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
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