The eight tests of infection that patients have are usually meant to be screened for the five tests of hepatitis B, HIV antibodies, syphilis antibodies, and hepatitis C antibodies. Some hospitals call it the infectious disease eight and some call it the preoperative eight. Other hospitals only have separate tests for a few items and do not have a uniform package. The purpose of the Infectious Eight is to do preoperative screening, which can be done in preparation for outpatient surgery or as a mandatory test before surgery for inpatients at some hospitals. If a patient is found to have a corresponding problem with such items during the preoperative screening, he or she may need to be treated and treated accordingly in advance before surgery can be done. Some patients with problems with laboratory tests may require consultation with the appropriate department. The eight tests for infection can also alert the surgeons and nurses to the need for intraoperative protection and disinfection of the operating room clothing and instruments.