Answer : Viral surface antigen (HBsAg) .. The envelope of h | 🎯MCQs For Medical Students🎯

Answer : Viral surface antigen (HBsAg) ..

The envelope of hepatitis B virus contains an antigen known as HBsAg (hepatitis B surface antigen). This antigen is of importance because production of antibodies to HBsAg indicates immunity against hepatitis B virus, which resulted either from infection or vaccination with HBsAg.