Hepatitis B is not innate. Hepatitis B is an infectious disease and not a hereditary disease. The main modes of transmission of hepatitis B include mother-to-child transmission, blood transmission and sexual transmission. In the past, the main mode of transmission of hepatitis B in China was mother-to-child transmission, so it showed the characteristics of family gathering, the mother had hepatitis B, and several children were born with hepatitis B. Therefore, some people may think that hepatitis B is inherited from birth, but in fact, it is not. The main reason is that the mother transmitted the virus to the newborn during or before and after delivery, and newborns and infants are not immune to hepatitis B. After infection with the hepatitis B virus, they cannot clear it themselves and will gradually become chronic, and finally develop into slow hepatitis B, including major triplets and minor triplets, and several other conditions. Nowadays, mother-to-child transmission can be avoided through effective mother-to-child interruption.