1. The hepatitis B vaccine contains antigens from the surface of the hepatitis B virus.
2. After receiving the hepatitis B vaccine, the immune system
produces memory cells that remain in the body.
3. If the vaccinated individual is later expected to the the hepatitis B virus, a primary immune response is triggered.
4. If the macrophages change, then the immune system will not
recognize them. Scientists would have to develop a new vaccine.\
Who is in need of the hepatitis B vaccine?
Every newborn, every child and adolescent under the age of 19, every adult between the ages of 19 and 59, and every adult 60 and older with risk factors for hepatitis B infection should receive the hepatitis B vaccine.
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