The hepatitis B DPT can firstly understand whether the body is infected with the hepatitis B virus, and if so, what immune status the body is in. If the surface antigen is negative, it indicates that there is no hepatitis B virus infection; if the surface antibody is positive, it indicates that the body already has protection against hepatitis B. The higher the antibody value, the stronger the protection. The higher the antibody number, the stronger the protection. If the two-to-one half indicates a major triplet, the virus is more infectious; a minor triplet indicates less infectious. If a patient with hepatitis B undergoes antiviral treatment, and if he can change from a major triplet to a minor triplet, it means that immune control has been achieved and the treatment is effective. In addition, you can also observe the value of surface antigen, if the value of surface antigen continues to drop significantly, it means that the virus has been suppressed, and the antiviral is also effective.