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. 2022 Feb 12;103(1):115659. doi: 10.1016/j.diagmicrobio.2022.115659

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Fig 2 — Beeswarm plots of the IgG anti-S and IgG anti-N results per 30 day time window after positive RT-PCR in non-severe (A−B, yellow) and severe (C−D, red) COVID-19 patients. Boxplots show the P25, median and P75 of antibody levels per 30 day time window. Dashed red and violet lines represent the manufacturer's cut-offs for positivity for anti-S (50 AU/mL) and anti-N (1.4 S/CO). Results for IgG anti-S higher than 20.000 AU/mL are shown as 20.000 AU/mL. Number of patients per 30 day window (severe/non-severe): 0 to 29d: n = 103/83, 30 to 59d: n = 42/50, 60 to 89d: n = 49/32, 90 to 119d: n = 43/52, 120 to 149d: n = 36/45, 150 to 179d: n = 24/34, 180 to 209d: n = 28/34, 210 to 239d: n = 19/33, 240 to 269d: n = 24, 270 to 299d: n = 16/29, 300 to 329d: n = 17/22, 330 to 365d: n = 12/18. d = day.