**Core Concept:** Hepatitis B vaccination is a routine immunization against hepatitis B virus (HBV) infection. The vaccine stimulates the immune system to produce hepatitis B surface antigen (HBsAg), hepatitis B core antigen (HBcAg), and hepatitis B e antigen (HBeAg), which serve as serum markers for immune response and infection status.

**Why the Correct Answer is Right:** After Hepatitis B vaccination, the immune system generates antibodies against HBsAg, HBcAg, and HBeAg. These antibodies, specifically anti-HBs (anti-HBsAg), indicate successful vaccination and immunity against HBV infection. In contrast, the presence of HBsAg and HBeAg in serum suggests active HBV infection.

**Why Each Wrong Option is Incorrect:**

A. HBsAg: This marker indicates active HBV infection and is not a suitable indicator of immunity after vaccination.
B. HBeAg: Similar to HBsAg, it is a marker for active infection and not indicative of vaccine-induced immunity.
C. HBV DNA: This is a marker for the presence of the virus itself, rather than immune response to vaccination.
D. Anti-HBcAg: This antibody response is generated in response to HBcAg, not a suitable marker for immune response to vaccination.

**Clinical Pearl:** The ideal serum marker for assessing the immune response to Hepatitis B vaccination is anti-HBs. In contrast, HBsAg and HBeAg are produced during active HBV infection, making them unsuitable indicators of vaccination success. Monitoring anti-HBs levels after vaccination can guide when to administer a booster dose if immunity wanes over time.