Marriage tests are performed to check for hepatitis B. The test for hepatitis B during the marriage test may be a simple qualitative check for hepatitis B surface antigen, which is only a screening test for hepatitis B. It is also possible to check the complete quantification of the five hepatitis B items, which can more accurately determine the status of people infected with the hepatitis B virus. The main purpose of checking for hepatitis B during the marriage test is to detect people with hepatitis B to prevent transmission. Because hepatitis B is a sexually transmitted disease, it can be transmitted to the other person through sexual intercourse after marriage. Hepatitis B is also a disease that can be transmitted from mother to child. If the mother is a hepatitis B patient, she may transmit the disease to her child through the placenta after pregnancy or to the child at birth. Hepatitis B is an infectious disease that can be prevented, and if you are found to be a hepatitis B patient, you can completely avoid transmission by getting the hepatitis B vaccine.