Hepatitis B DNA 7.9e+3U/ml suggests that the hepatitis B virus is elevated, in the period of viral replication, there is a certain degree of infectiousness. Hepatitis B DNA is Hepatitis B Virus Deoxyribonucleic Acid, referred to as HBV-DNA, the normal reference value is less than three times 10 or negative, the higher the value, the more active the virus replication, the more infectious, the more serious the liver function damage, the more likely to progress to cirrhosis and other complications. HBV-DNA7.9e+3U/ml suggests that the hepatitis B virus is elevated, generally considered to be 3-5 times the amount of low replication, in the period of viral replication, there is a certain degree of contagiousness, you need to combine with liver function, liver ultrasound and other tests to assess the patient and the situation, under the guidance of the doctor to use antiviral therapy such as entecavir. HBV-DNA7.9e+3U/ml is the elevated level of hepatitis B virus, it is recommended to seek medical treatment in time to avoid aggravating the condition.