Hepatitis B virus carriers are a pathological state of patients infected with the hepatitis B virus, mostly in a state of latent carriage of the virus at the beginning of infection with the hepatitis B virus, or it can be a state of regression following the onset of hepatitis B. Many family members of hepatitis B virus carriers are worried about being infected, “Are hepatitis B virus carriers infectious”? The actual fact is that you can find a lot of people who have been in the business for a long time. The normal value of HBVDNA is 1000 cps/ml, and if it exceeds that value, it is more infectious. Most of the hepatitis B virus carriers are inactive and less infectious. Only a small percentage of hepatitis B carriers have active viral replication and are infectious. Hepatitis B virus infection can be effectively prevented. Since the implementation of hepatitis B vaccination in 1992, especially for newborns, the rate of hepatitis B virus carriers has begun to show a gradual decline. It is projected that through the unremitting efforts of two or three generations, the hepatitis B virus carriage rate in China can be reduced from the current 10% to less than 1%, which is at or below the level of Japan and developed Western countries.