Anti-HBs positivity indicates immunity due to:

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Multiple Choice

Anti-HBs positivity indicates immunity due to:

Explanation:
Anti-HBs is the antibody against the hepatitis B surface antigen, and its presence signifies protective immunity to HBV. It appears after successful vaccination or after the body clears a natural HBV infection. It is not produced during active infection, and it is not present in someone with no immunity. So, anti-HBs positivity means immunity due to either prior infection that has resolved or vaccination. (If anti-HBs appears without anti-HBc, it favors vaccination-induced immunity; if both anti-HBs and anti-HBc are present, immunity likely came from a resolved natural infection.)

Anti-HBs is the antibody against the hepatitis B surface antigen, and its presence signifies protective immunity to HBV. It appears after successful vaccination or after the body clears a natural HBV infection. It is not produced during active infection, and it is not present in someone with no immunity. So, anti-HBs positivity means immunity due to either prior infection that has resolved or vaccination. (If anti-HBs appears without anti-HBc, it favors vaccination-induced immunity; if both anti-HBs and anti-HBc are present, immunity likely came from a resolved natural infection.)

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