Hepatitis B carriers with hepatitis B DNA less than 100 U/ml may turn negative, but only if immune clearance occurs. If the carrier does not undergo immune clearance, then even if the hepatitis B DNA is less than 100U/ml, it will not be converted, and the virus will still be contagious. Hepatitis B carriers are people who carry the hepatitis B virus and are positive for the surface antigen of hepatitis B, but do not have symptoms of liver disease, but these people also need to be treated or they can spread the virus to others. Hepatitis B DNA less than 100U/ml itself already indicates that the virus in the body is negative, the virus test has turned negative, but the hepatitis B surface antigen may not turn negative, because the immune system of hepatitis B carriers does not recognize the hepatitis B virus, and at this time the virus can not be cleared, which will lead to the emergence of the surface antigen of hepatitis B. However, all the hepatitis B carriers have the hepatitis B virus, but there are no symptoms of liver disease. However, not all hepatitis B carriers with DNA less than 100U/ml can not turn negative, some special human body can occur immune clearance, the body of the virus will be cleared by the immune system, the e antigen will also be negative, a few patients surface antigen will also be negative. Hepatitis B carriers also need to use long-term medication to control the virus, otherwise not only may occur in their own hepatitis disease, but also may affect the health of others, and the patients themselves should do a good job of protective measures, including avoiding the sharing of dishes with others.