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Table 2 Temporal variation of overall IgG and IgM antibody positive responses in patient sera

From: IgG and IgM antibody formation to spike and nucleocapsid proteins in COVID-19 characterized by multiplex immunoblot assays

Days after positive RT-qPCR Total number of sera tested No. of sera with IgM antibodies No. of sera with IgG antibodies No. of sera with either IgM and/or IgG antibodies
0–10 6 5 3 6
11–20 12 8 11 11
21–30 22 12 18 20
31–40 18 6 15 15
41–50 9 2 7 7
51–65 8 3 8 8
100–154 9 0 4 4