Patient's question:
I have been vaccinated against hepatitis B. I thought my body would definitely not have any problems, and I also didn't experience any further discomfort symptoms. However, when I went for a factory recruitment health check, I was diagnosed with hepatitis B, specifically the small three positive type. I really don't understand why the vaccine I received didn't work. Why can someone get hepatitis B even after being vaccinated against it?Doctor's answer:
The hepatitis B vaccine is a special medication used to prevent hepatitis B. After vaccination, it stimulates the immune system to produce protective antibodies, which exist in the body's fluids. Once the hepatitis B virus reappears, the antibodies immediately take effect to completely eliminate it, blocking transmission, and will never harm the liver, thereby enabling the body to develop immunity against hepatitis B.The antibody levels produced after receiving the hepatitis B vaccine gradually increase over time. Generally, after being vaccinated with three doses, 97% of people can detect surface antibodies one month later; this level remains stable for the second year; by the third year, it drops to around 74%, while the antibody titer rises.