Clinical application of Chemiluminescence Microparticle Immunoassay for SARS-CoV-2 infection diagnosis

•Chemiluminescence Microparticle Immunoassay has high sensitivity and specificity.•The CMIA can provide important complementation to RNA assay for COVID-19 diagnosis.•The age and gender do not affect the production of antibodies.•The days of post onset was the main factor to influences the antibodies production.•The disease-severity of COVID-19 patients affect the antibodies levels.