Serum-IgG responses to SARS-CoV-2 after mild and severe COVID-19 infection

<ol> <li>SARS-CoV-2 specific serum IgG (AU/ml), as measured by&nbsp;iFlash 1800 chemiluminescent immunoassay (YHLO, China), in 15 patients with severe COVID-19 and 32 patients with mild COVID-19 over &gt;90 days follow-up post symptom onset.</li> <li>SARS-CoV-2 receptor binding domain&nbsp;specific&nbsp;serum IgM, IgG and IgA in&nbsp;samples collected&nbsp;&gt;75 days post symtom onset from 21 patients with mild or severe COVID-19. Measured by in-house ELISA, results presented as AUC of titration curve.</li> </ol>