Patient's question:
NoDoctor's answer:
The main component of the hepatitis B vaccine is the surface antigen of the hepatitis B virus, which is an outer coat protein of the hepatitis B virus and not a complete virus. This surface antigen does not contain viral genetic material and lacks infectivity and pathogenicity, but retains immunogenicity, capable of stimulating the body to produce protective antibodies. As long as it is a qualified vaccine, it generally has no effect on the fetus and there is no need to worry.