The enzyme-linked immunosorbent assay (ELISA) test is a stable immunodiagnostic assay technique that can be applied to detect human diseases such as infectious diseases, parasitic diseases and flying infectious diseases caused by various pathogenic microorganisms. ELISA is mainly used to conduct a quantitative measurement of antibodies, antigens, proteins and glycoproteins accurately. It is not only suitable for clinical samples-- even thousands of samples at the same time, but also Suitable for human serum epidemiological investigations. Not only can it detect antibodies in serum, but it can also be used for free antigens in body fluids or tissues. It is an effective method for early diagnosis.