Hepatitis B DNA 8.66E+002 is a low amount of replication, not high, but it does require liver testing and treatment if liver impairment occurs. Hepatitis B DNA8.66E+002 refers to the individual serum through fluorescent staining and other ways to check which the content of hepatitis B virus DNA, where E is 10, hepatitis B DNA8.66E+002 is the body of the 1 ml of blood contains 8.66 x 10 of the second copy amount of the hepatitis B virus, generally lower than 10 of the third are low amount of replication, not high value. However, it is also necessary to carry out liver function tests to determine whether the hepatitis B virus has caused damage to the liver. If no damage occurs, no treatment is needed and regular observation is required; if liver damage occurs, it is recommended to go to the hospital in time and under the guidance of the doctor to carry out antiviral and liver protection treatment.