When the results of the infectious disease test are available depends on the conditions and level of the hospital, but usually the results are available in the morning and afternoon at regular tertiary hospitals. The four infectious diseases, also known as pre-transfusion four, is a preoperative and pre-transfusion must check the items, mainly to test the body hepatitis B five, hepatitis C antibodies, AIDS antibodies and syphilis antibodies, in order to avoid the occurrence of blood-borne diseases. In most hospitals, the results will be available in the afternoon if the blood is drawn in the morning, or in the afternoon and the next morning. In addition, some hospitals may send blood samples out to other testing facilities or pool blood specimens together due to limited testing levels, which may result in late release of results. It is worth noting that only this test does not require fasting, regular diet can be done, and the test can also be done in the afternoon at the hospital, but the specific time of the results should be consulted with the attending doctor of the local hospital.