Hepatitis B virus is not resistant to high temperature, acid and alkali, and can be inactivated by ultraviolet radiation. Generally speaking, if the water temperature reaches 60℃, hepatitis B virus can survive for 10 hours, and hepatitis B virus will lose its activity if boiling water is boiled for more than 10 minutes. Therefore, boiling water at 100℃ can kill hepatitis B virus, and it is not easy to be infected with hepatitis B virus in daily life. Hepatitis B is transmitted through three clear ways, namely, blood transmission, mother-to-child transmission and sexual contact. Daily meals, hugs, handshakes, etc. cannot transmit hepatitis B virus and can be prevented through vaccination against hepatitis B. After producing hepatitis B surface antibody, the hepatitis B virus has the ability to infect the body. The production of hepatitis B surface antibody has a protective effect against the hepatitis B virus, and if the titer of hepatitis B surface antibody is above 100mIU/ml, it is very effective in preventing the infection of hepatitis B virus.