A 49-year-old man comes to the physician for a health maintenance examination. Laboratory studies are shown:
HepA IgM Negative
HepA IgG Positive
HepB surface antigen Negative
HepB surface antibody Negative
HepB core antibody Positive
Which of the following is the most likely explanation for these findings?
Hepatitis A infection
Hepatitis B acute infection
Hepatitis B chronic infection
Immune to hepatitis B due to clearance
Immune to hepatitis B due to vaccination
