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Infection Control · single question

Risk of occupational transmission in the dental office, from LEAST to MOST likely after exposure:

  1. Hep C → Hep B → HIV
  2. HIV → Hep C → Hep B
  3. Hep C → HIV → Hep B
  4. Hep B → Hep C → HIV
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Correct answer: B. HIV → Hep C → Hep B

  • A. Incorrect. This ordering is wrong; HIV (≈0.3%) is the lowest, not Hep C.
  • B. Correct. Per-exposure transmission risk rises HIV (~0.3%) < Hep C (~1.8%) < Hep B (up to ~30%).
  • C. Incorrect. Hep C is higher than HIV, so HIV should be first (lowest).
  • D. Incorrect. Hep B is the HIGHEST risk, so it cannot be first.

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