Hepatitis B viral load down to 100 does not mean recovery. Hepatitis B patient’s viral quantitative drop to 100, generally indicates that the patient’s body of the hepatitis B virus has turned negative, the body of the hepatitis B virus replication is reduced, and is not easy to infect others, for the patient himself, for the treatment and control of the disease in the future to provide a certain good foundation, but also need to carry out further testing of the surface antigen, and regularly do a good job in the monitoring of liver function. At present, hepatitis B virus DNA test is mainly applied to the following aspects: to understand the number of viruses in the patient’s body; to understand the replication of viruses; whether hepatitis B disease is infectious and contagious; whether it is necessary for the patient to take medication or not; whether the abnormalities of liver function are related to the virus; to judge the specific medication and overall treatment of the patient. Hepatitis B virus DNA test results alone can not be accurately judged, but also need to be combined with the characteristics of the medical history, other test results in order to make accurate judgments, it is recommended to clarify the relevant situation under the guidance of the doctor.