What does the second weak positivity of second liver 5 mean

The second item of the five items of hepatitis B refers to hepatitis B surface antibody, and its weak positive refers to the presence of hepatitis B virus antibody in the body, but the number of antibodies is small, it is best to be admitted to hospital for re-injection of hepatitis B vaccine, increase the number of hepatitis B virus antibody in the body, and increase the resistance to hepatitis B virus.