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. 2022 Aug 5;21:100479. doi: 10.1016/j.lanepe.2022.100479

Figure 1.

Figure 1

Anti-nucleocapsid IgG antibody response after recent infection. The level of the anti-N IgG antibody response is displayed as signal to cut-off (S/CO) ratio with an interpretation cut-off of 1·4 S/CO as recommended by the manufacturer (green line). The dotted vertical lines at 14 and 86 days indicate the end of the self-deferral period for blood donors after first positive SARS-CoV-2 test result and when the estimated mean IgG response was equal to the interpretation cut-off, respectively.