Antibody testing refers to the sampling and quantitative analysis of antibodies against specific pathogens present in the blood, which can effectively determine the effectiveness of treatment and the prognosis of infection treatment. After a normal organism is infected with germs or bacteria, antigens of specific infectious substances will appear in the organism, which will stimulate the immune system to produce antibodies. Antibodies destroy the genetic material of the antigen and effectively eliminate the symptoms of infection. Antibody testing is therefore a direct indicator of a person’s immune function, treatment of the infection, or resistance to the next infection. Currently, antibody testing methods include immunofluorescence, immunoenzymatic, and radioimmunoassay, which are usually performed by centrifugation of a blood sample. It is recommended to stop the use of anti-infective drugs or antibiotics before the antibody test or blood sample collection, in order to restore the number of antibodies and antigens in the body to the normal level, thus improving the accuracy of the test results.