Hepatitis B negative refers to the absence of hepatitis B virus infection, a phenomenon that occurs in healthy people or in patients who have been cured of hepatitis B. However, it does not mean that you will not be infected by the hepatitis B virus, and in terms of safety, you need to be checked for the presence of hepatitis B antibodies, and get vaccinated with the hepatitis B vaccine if necessary. The test for checking whether you have hepatitis B and whether you are infectious is the Hepatitis B Penta test, which includes Hepatitis B Surface Antigen (HBsAg) and Hepatitis B Surface Antibody (anti-HBs), Hepatitis B e Antigen (HBeAg) and Hepatitis B e Antibody (anti-HBe), and Hepatitis B Core Antibody (anti-HBc), and is therefore also known as the Hepatitis B 2.5 test. HBsAg is a sign of virus infection, but it does not reflect the replication of virus and the degree of replication, infectiousness; HBsAb is the protective antibody of human body, and a positive test indicates that the body has recovered or has resistance; HBeAg is a sign of virus replication; HBeAb is a sign of cessation or reduction of virus replication, but it does not mean the infectiousness is weak. HBeAg is a sign of viral replication; HBeAb is a sign of cessation or reduction of viral replication, which means that the infectiousness is weaker, but it does not mean that there is no infectiousness at all. HBcAb is a sign that you have been infected or are being infected. HBcAb is a sign that you have been infected or are being infected. HBcAb is a sign that you have been infected or are being infected. It is necessary to analyze each case individually.