Fig. 3: Correlation of SARS-CoV-2-specific antibody test results and the neutralisation test (NT). | Communications Medicine

Fig. 3: Correlation of SARS-CoV-2-specific antibody test results and the neutralisation test (NT).

From: Neutralising SARS-CoV-2 RBD-specific antibodies persist for at least six months independently of symptoms in adults

Fig. 3

Results from 41 participants with either detectable S1-specific IgG and/or IgA are expressed as antibody ratios or cut-off index (COI) with NT result expressed as titre 1:X measured in sera from the initial blood dray at day 0. Antibody ratios, COI and NT titres after logarithmic transformation. Kappa coefficient indicating agreement between the assays (very good > 0.8). The results presented as ratio or COI depend on the manufacturer´s instructions. Neutralisation test (NT).

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