Which of the following does not carry a risk of infection from a hepatitis B patient?

The correct response highlights that Anti-HBs Ag does not carry a risk of infection from a hepatitis B patient, which is crucial for understanding hepatitis B serology.

Anti-HBs is an antibody that indicates recovery from hepatitis B infection and the development of immunity, whether from natural infection or vaccination. When this antibody is present, it signals that a person has either cleared the virus from their system or has been vaccinated against hepatitis B, meaning they are not infectious. Therefore, the presence of Anti-HBs Ag in a patient indicates a low risk of transmission, in contrast to other antigens, such as HBs Ag and HBe Ag, which are markers of active viral infection and are associated with a higher risk of spreading the virus.

The other choices are markers that indicate active infection or the presence of the hepatitis B virus, which can be infectious. HBs Ag reflects the presence of the virus, while HBe Ag is associated with high levels of viral replication and increased infectivity. Understanding these markers is essential for managing and preventing the spread of hepatitis B in clinical settings.