Vaccines and Immunoprophylaxis · USMLE Step 1

Which vaccine prevents infection by a virus with circular, partially double-stranded DNA?

  1. Hepatitis A
  2. Hepatitis B
  3. Rotavirus
  4. MMR
Show answer and explanation

Correct answer: Hepatitis B

Hepatitis B is a partially double-stranded DNA virus. The vaccine uses recombinant HBsAg to elicit immunity.

Difficulty: Medium Question 9 of 20

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