What laboratory results indicate a staff member is immune to hepatitis B due to vaccination?

A staff member's immunity to hepatitis B due to vaccination is indicated by the presence of specific antibodies in their laboratory results. The most relevant marker for indicating immunity is the presence of Anti-HBs, which reflects the immune response generated following vaccination.

When a person is vaccinated against hepatitis B, their body produces Anti-HBs as a result of exposure to the vaccine which contains the hepatitis B surface antigen (HBsAg). Therefore, detecting Anti-HBs in the laboratory tests confirms that the individual has developed immunity to the virus as a result of vaccination.

Additionally, a negative Anti-HBc indicates that there has been no prior infection with the hepatitis B virus, which aligns with being vaccinated, as the vaccine does not confer infection. It's essential to note that HBsAg positivity would signify an active infection, while IgM anti-HBc positivity would indicate recent infection. In the context of vaccination and immunity, neither of these results would indicate immunity.

Thus, the presence of Anti-HBs confirms that a staff member is immune to hepatitis B due to vaccination.