Final answer:
The hepatitis B vaccine helps prevent liver cancer by stimulating the immune response to fight off the virus.
Step-by-step explanation:
Immunization against the hepatitis B virus (HBV) helps prevent the development of liver cancer. The hepatitis B vaccine stimulates the immune response to eliminate the virus and prevent chronic infection, which significantly lowers the risk of liver cancer. Most people receive their first hepatitis B vaccination at birth, which is critical since the early immune response can prevent the virus from becoming a chronic infection that might lead to liver cancer decades later.