For Research Use Only. Not for use in Diagnostic Procedures.
Both IgM and IgG are immunoglobulin which are produced by the immune system to provide protection against SARS-CoV-2. Some patients with negative results in nucleic acid test show positive in IgM test, indicating that the IgG / IgM detection is one of the effective methods for the analysis of SARS CoV-2. The level of IgM antibody begins to rise after 1 week after the initial infection, while the IgG appears later than IgM (usually in 14 days after infection) and can last for 6 months or even several years, which means that the IgG serves as an indicator of previous infection. Suspected patients that are infected by SARS CoV-2 can be rapidly identified by simultaneous monitoring of IgM and IgG. During the outbreak period of 2003-SARS and the 2016-Zika, IgM / IgG antibody detection was used as one of the recommended testing methods.
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