A 23-year-old woman who has sex with men is seen for a follow-up evaluation in a sexual health clinic after a very recent diagnosis of HIV. As part of the baseline laboratory studies, screening for hepatitis B virus (HBV) infection shows negative hepatitis B surface antigen (HBsAg), positive hepatitis B surface antibody (anti-HBs), and positive total antibody to hepatitis B core antigen (total anti-HBc). She does not know if she previously received hepatitis B vaccine as a child. Which one of the following is the best interpretation of the HBV serologic tests? Resolution of prior hepatitis B infection Acute HBV infection Chronic HBV infection Immune to HBV from prior immunization