A 35-year-old male presents to the clinic with fatigue, mild fever, and loss of appetite for the past two weeks. He reports a recent unprotected sexual encounter and is concerned about possible hepatitis B exposure. His hepatitis B serologic panel returns with the following results: HBsAg: Negative Anti-HBs: Negative Anti-HBc IgM: Positive Which of the following is the best interpretation of these serologic findings?
