China is now a major country with hepatitis B, which means that it has the largest number of people infected with hepatitis B. This is due to the large population of the country. People before the early 1990s were not vaccinated against hepatitis B. People lack antibodies against the hepatitis B virus and are unprotected against hepatitis B, so it is widely spread through blood transmission, sexual contact, and vertical transmission from mother to child. For example, in the past many years, hospitals did not use disposable sanitary materials for treatment, certain instruments were generally sterilized and used repeatedly, and there was no protection in childbirth and sexual life, which made the population of Hepatitis B in our country increasing.