In order to avoid infection of medical origin, we need to test for hepatitis B virus during all invasive examinations or treatments. If the hepatitis B virus is positive, the instruments we use should be strictly sterilized and separated from the instruments of negative patients. Hepatitis B is a chronic infectious disease that seriously threatens the health of our people and can cause hepatitis, liver fibrosis, liver cirrhosis and even liver cancer. In order to reduce the incidence of hepatitis B, all newborns in our country are vaccinated with the hepatitis B vaccine free of charge, which produces effective surface antibodies against hepatitis B virus infection. Hepatitis B carriers cannot be vaccinated against hepatitis B. Instead, they need to undergo regular liver disease checkups every six months, and if an attack of hepatitis is detected during the checkup, they need to be treated with oral antiviral drugs.