Hepatitis B patients and hepatitis B virus carriers are the main sources of transmission of hepatitis B virus. The main ways of hepatitis B transmission include transmission through blood, mother-to-child transmission, sexual transmission, medical transmission, transmission through broken skin and mucous membranes, such as foot trimming, tattooing, earring piercing, accidental exposure of medical personnel at work, sharing razors or toothbrushes, etc. Such ways can also transmit the hepatitis B virus. Hepatitis B virus is very harmful to the human body and can cause inflammation and necrosis of liver cells, which can lead to liver fibrosis, liver cirrhosis, and even liver cancer. Therefore, clinical control of the transmission of hepatitis B virus is the main issue, controlling the source of infection, cutting off the transmission route, and protecting susceptible people. Hepatitis B virus is not transmitted through the respiratory and digestive tracts, and general contact with hepatitis B patients will not infect the hepatitis B virus, such as kissing, hugging, sharing utensils, sharing water cups, etc.