Hepatitis B half-positive 15 indicates the presence of hepatitis B. Most of them are hepatitis B virus carriers. Hepatitis B two half is an important reference index to detect whether there is hepatitis B. 15 positive is positive for surface antigen and core antibody, suggesting that there is hepatitis B. These patients are negative for hepatitis B E antigen, and the virus replication is relatively inactive, so most of the patients with hepatitis B 15 positive are hepatitis B carriers. Under the interaction between hepatitis B virus and human immune system, various types of hepatitis B can be converted to each other, i.e., hepatitis B 15-positive may be converted to triple or triple, so 15-positive patients also need to regularly review hepatitis B five, ultrasound, hepatitis B DNA, liver function, to make clear the change of the condition, so as to deal with it as early as possible.