Hepatitis B virus surface antibody positive ↓ negative is normal

Hepatitis B virus surface antibody is positive, this belongs to the normal phenomenon, hepatitis B surface antibody belongs to a protective antibody, it can help the body resist the hepatitis B virus outside, if hepatitis B surface antibody gradually turns negative, this belongs to the abnormal phenomenon, need to inject hepatitis B vaccine to strengthen the body's defense ability to hepatitis B virus.