Given below is the lab details of a patient suffering from Hepatitis B virus infection. What do the test indicate


HBs Ag
Negative


AntiHBsAg
Negative


IgM antiHBC
Positive


IgG anti HBC
Negative: (A) Chronic infection, (B) Immunisation, (C) Window period, (D) Previous infection
Answer is C. IgG anti HBC is the only serological marker detectable during window period.