Clinically, people who are HBsAg positive without any symptoms or signs and with normal liver function tests for many years (no previous history of liver function abnormalities) are often called asymptomatic carriers of hepatitis B virus (not to be called healthy carriers). It is estimated that there are about 215 million people with hepatitis B virus in the world, and about 120 million in China. People who are carriers of hepatitis B virus are the hosts on which the hepatitis B virus continues to live, and they play an important role in the transmission and development of hepatitis B, which has become a serious social problem. Asymptomatic HBsAg carriers are not “healthy” in the true sense of the word; these people have the virus in their bodies and therefore have the potential to infect others. Therefore, HBsAg carriers should not donate blood, pay attention to personal hygiene and public health, develop good hygiene habits, and not mix toiletries with others. When in close contact with people carrying the hepatitis B virus, it is important to get the hepatitis B vaccine in time to prevent the disease from occurring.