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. 2020 Mar 21:ciaa310. doi: 10.1093/cid/ciaa310

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© The Author(s) 2020. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved. For permissions, e-mail: journals.permissions@oup.com.

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Figure 3. — Characteristics of plasma antibodies in patients infected with SARS-CoV-2. A, Time of appearance of IgM, IgA, and IgG antibodies to SARS-CoV-2, determined by ELISA of plasma samples obtained from inpatients with SARS-CoV-2 infection. As we only wanted to show the early time points, the plasma samples used for detection of IgM and IgA antibodies were selected from patients who had fever or respiratory infectious symptoms within 7 days. The plasma samples used for detection of IgG antibodies were selected from all the patients whose IgG antibodies were positive. B, Levels of IgM, IgA, and IgG antibodies against SARS-CoV-2 in plasma samples after symptom onset. Antibody titers are expressed as GMTs. Abbreviations: ELISA, enzyme-linked immunosorbent assay; GMT, geometric mean titer; Ig, immunoglobulin. *P <.05.