Which result indicates natural immunity to hepatitis B?

Which result indicates natural immunity to hepatitis B?

• A. HBsAg: neg, Anti-HBc: neg, Anti-HBs: pos
• B. HBsAg: pos, Anti-HBc: pos, IgM anti-HBc: pos, Anti-HBs: neg
• C. HBsAg: neg, Anti-HBc: pos, Anti-HBs: pos
• D. HBsAg: neg, Anti-HBc: neg, Anti-HBs: neg

Answer: (A)

Natural immunity to hepatitis B is indicated by the presence of specific antibodies and the absence of certain antigens that signal active infection. In the context of hepatitis B serology, the key markers are HBsAg (Hepatitis B surface Antigen), Anti-HBc (Antibody to Hepatitis B core Antigen), and Anti-HBs (Antibody to Hepatitis B surface Antigen). The scenario indicating natural immunity shows that HBsAg is negative, which means there is no active hepatitis B infection. Furthermore, the presence of Anti-HBs confirms that the immune system has successfully responded to a previous infection or vaccination, providing immunity. The absence of Anti-HBc in this case reinforces that there is no current or past exposure to the virus, clarifying that the immunity must come from vaccination rather than a past infection. As such, the combination of having HBsAg negative, Anti-HBc negative, and Anti-HBs positive strongly signifies that the individual is immune to hepatitis B, thus indicating natural immunity. This interpretation aligns with standard serological profiles used in clinical practice to assess a person's immunity status regarding hepatitis B.

Natural immunity to hepatitis B is indicated by the presence of specific antibodies and the absence of certain antigens that signal active infection. In the context of hepatitis B serology, the key markers are HBsAg (Hepatitis B surface Antigen), Anti-HBc (Antibody to Hepatitis B core Antigen), and Anti-HBs (Antibody to Hepatitis B surface Antigen).

The scenario indicating natural immunity shows that HBsAg is negative, which means there is no active hepatitis B infection. Furthermore, the presence of Anti-HBs confirms that the immune system has successfully responded to a previous infection or vaccination, providing immunity. The absence of Anti-HBc in this case reinforces that there is no current or past exposure to the virus, clarifying that the immunity must come from vaccination rather than a past infection.

As such, the combination of having HBsAg negative, Anti-HBc negative, and Anti-HBs positive strongly signifies that the individual is immune to hepatitis B, thus indicating natural immunity. This interpretation aligns with standard serological profiles used in clinical practice to assess a person's immunity status regarding hepatitis B.