Final answer:
A positive Anti-HBs indicates the presence of antibodies against the hepatitis B virus (HBV) in the blood.
Step-by-step explanation:
A positive anti-HBs (Hep B antibody) indicates the presence of antibodies against the hepatitis B virus (HBV) in the blood. Antibodies are produced by the immune system in response to an infection or vaccination. A positive result suggests that the person has either been previously infected with HBV or has received the hepatitis B vaccine.