Medical personnel will be drawn blood will be sent to a variety of examination instruments, because different tests require different tubes of blood, waiting for the results to come out for review, if the results are considered to have obvious abnormal indicators, the remaining blood need to do the test again to determine whether the patient’s indicators are abnormal or experimental error. When the results out of the report, the residual blood or as medical waste, will be sent to a special place for harmless treatment, its can not be casually disposed of as ordinary garbage, otherwise if there is a contagious disease, or special bacteria and viruses, there will be a risk of contamination around. Therefore, some laboratory tests can only be done in higher-level testing centers or hospitals, in order to prevent biochemical contamination, such as the current monitoring of the new coronavirus, it is necessary to have the appropriate testing qualifications, otherwise it will result in the leakage of the virus.