A 20-year-old Hispanic male presents to his college clinic following a recent spring break trip to Cancun. He complains of nausea, vomiting, and diarrhea. His physical exam demonstrates marked...

A 20-year-old Hispanic male presents to his college clinic following a recent spring break trip to Cancun. He complains of nausea, vomiting, and diarrhea. His physical exam demonstrates marked jaundice. Pertinent labs include increased AST, ALT, (+) IgM HAV, (+) anti-HbS, (−) anti-HBc, and (−) anti-HCV. Which of the following explains his symptoms and laboratory findings?

A. Acute HAV infection

B. Acute HBV infection

C. Acute HCV infection

D. Chronic HBV infection