Hepatitis B is a blood-borne, mother-to-child and sexually transmitted disease, and the vast majority of people who contract hepatitis B are infected through mother-to-child transmission as children. If you want to know if you are infected with hepatitis B and if you have protective antibodies against hepatitis B, it is recommended that you have a quantitative test for hepatitis B triplet, which costs about 100 yuan. This test is usually done at the Infectious Diseases Department or the Infection Department of a hospital and is ordered by a doctor. If the test is only for hepatitis B triple quantification, you do not need to fast, and you can come to the hospital for a blood test after breakfast. However, if the liver function, upper abdominal ultrasound and upper abdominal CT are also tested in addition to the hepatitis B triple quantification, you need to come to the hospital on an empty stomach for the test, and usually the hepatitis B triple quantification will be tested in the morning and the results will be available in the afternoon. If some small hospitals send the tests to other places for testing, it may take a few days to get the results.