Figure 1 | Scientific Reports

Figure 1

From: Time course of the sensitivity and specificity of anti-SARS-CoV-2 IgM and IgG antibodies for symptomatic COVID-19 in Japan

Figure 1

The time courses of serum titers of SARS-CoV-2 antibodies in COVID-19 patients after symptom onset. We measured the titers of SARS-CoV-2 IgM and SARS-CoV-2 IgG in 125 sera collected from RT-PCR-positive patients (n = 26) and 68 sera collected from RT-PCR-negative patients (n = 35). The data are plotted for days 1–2, 3–4, 5–6, 7–8, 9–10, 11–12, 13–14, 15–16, 17–18, 19–20, and ≥ 21 since symptom onset. The bars show the median titers at each timepoint. The broken line shows the manufacturer’s cutoff value (10 AU/mL). (A) RT-PCR-positive patients, IgM. (B) RT-PCR-positive patients, IgG. (C) RT-PCR-negative patients, IgM. (D) RT-PCR-negative patients, IgG.

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