University of Michigan - Ann Arbor

The authors screened 177 individuals using nucleic acid testing (NAT). IgM and IgG antibodies from commercial serum kits were evaluated against SARS-CoV-2 nucleoprotein (N) and spike (S) proteins. Individuals were grouped into classifications based on COVID-19 severity NAT and IgM/ IgG response for a study sample of 177 participants: 63 healthy contacts of COVID-19 cases, 63 asymptomatic cases, and 51 mild cases. The authors also evaluated neutralizing antibody responses. 

Antibody dynamics to SARS-CoV-2 in Asymptomatic and Mild COVID-19 patients: Methods

Lei, Q., Hou, H., Wang, F., et al. 2020. Antibody dynamics to SARS-CoV-2 in Asymptomatic and Mild COVID-19 patients. 
* https://doi.org/10.1101/2020.07.09.20149633

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