Hepatitis B surface antibody 11.9mIU/mL is normal. Hepatitis B Surface Antibody 11.9mIU/mL mainly refers to the human body hepatitis B surface antibody shows positive during the hepatitis B five tests, which usually indicates that the hepatitis B vaccine has been vaccinated, and the effect of the vaccine is played in the body, and it can effectively prevent the infection of hepatitis B virus. The value detected is greater than 10mIU/mL, generally the higher the value indicates that the antibody has a stronger effect on the surface of Hepatitis B. Therefore, Hepatitis B Surface Antibody 11.9mIU/mL is normal. Hepatitis B is a kind of infectious disease caused by inflammation of liver after infection by hepatitis B virus, which can be transmitted through sex, mother-to-child transmission and blood transmission. Hepatitis B can be prevented by acquiring hepatitis B surface antibody through hepatitis B virus injection. If diagnosed with hepatitis B, patients should follow the doctor’s instructions to use antiviral drugs for treatment, such as entecavir dispersible tablets, tenofovir disoproxil fumarate tablets, lamivudine tablets and so on.