Children who have received 3 doses of the hepatitis B vaccine but still have no antibodies need to get vaccinated again?

Patient's question:

No symptoms

Doctor's answer:

Hello, if you have not produced hepatitis B surface antibodies, you need to get the hepatitis B vaccine again.
Advice: Since children have weak immunity, they need to be vaccinated with the hepatitis B vaccine to help them obtain hepatitis B surface antibodies and thus develop resistance to the hepatitis B virus. The enhanced hepatitis B vaccine should be administered at months 0, 1, and 6. By the seventh month, you can check the hepatitis B panel to see if the hepatitis B surface antibodies have been produced.