Hepatitis B 25 positive and Hepatitis B surface antibody HBsAb positive and Hepatitis B core antibody HBcAb positive, these 2 positives indicate that they have been infected with Hepatitis B in the past, and now they have antibodies and immunity, and they are in a state of recovery, the Hepatitis B surface antibody may turn to be negative, and the probability of the core antibody turning to be negative is smaller. Hepatitis B surface antibody is a kind of protective antibody, how long can the positivity last, with the passage of time, its titer is likely to get lower and lower, when its quantitative value is less than 10mIU/mL, the test will indicate that the antibody is negative. In addition, many people see hepatitis B surface antibody negative to be vaccinated against hepatitis B, if in the recovery period of hepatitis B infection, this is not appropriate, vaccination against hepatitis B need to consult a professional, do not blindly vaccination.