A 35-year-old man born in Vietnam attends for pre-employment health screening and is found to have the following results: HBsAg negative, anti-HBs positive at 850 IU/L, and anti-HBc (total) positive. His liver function tests are normal and he feels entirely well. He cannot recall ever being vaccinated against hepatitis B. Which one of the following best describes his hepatitis B status?
Keep going — a set of ten like this one, one at a time.
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