A positive plus sign for hepatitis B surface antibody means that there are hepatitis B antibodies in the body that are protective and that the hepatitis B vaccination is effective. Hepatitis B surface antibodies are protective antibodies, and many people have a panic attack when they see a positive plus sign after they get a lab test, but this test is completely different, and a positive result is a good result. If the number of antibodies in the body reaches a certain level, it can effectively protect the body from the hepatitis B virus, which is a very good measure to prevent hepatitis B. Our country is a large country with hepatitis B, so we must pay attention to it. The antibodies are not always there, some people have antibodies for a long time after the vaccination, and some people do not have antibodies after a period of time. It is necessary to review the vaccine periodically, and when there are no antibodies, it is necessary to replant the hepatitis B vaccine in a timely manner.