What is the Hepatitis B vaccine
Hepatitis B is a liver disease that can lead to the development of cancer later in life. Children are unlikely to contract it unless they have an infected adult in their household or they have been exposed to infected blood or other body fluids.
Does immunizing adults also help
Immunizing adults against the disease has been ineffective. The idea is to vaccinate people when they are still young children so that they are immune once they become adults.