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Fig. 2 | BMC Infectious Diseases

Fig. 2

From: Low Seroprevalence of SARS-CoV-2 in Rhode Island blood donors during may 2020 as determined using multiple serological assay formats

Fig. 2

Serological Analysis of Rhode Island Seroprevalence Donors. A; Percent of donors testing positive using IgM LFA (red), IgG LFA (green) or Ortho HTSA (blue). B; Venn diagram of seropositive samples using IgM LFA, IgG LFA and Ortho HTSA. C; Monoclonal antibody quantification of all seropositive donors using S1 spike protein (left) and Nucleocapsid (N) protein (right) ELISA assays. Median values and number of samples are shown. D; Spearman correlation coefficients, r, between each serological assay. E-G; Evaluation of seropositive donors reactive to either the Ortho HTSA assay (Ortho+), the IgG LFA (IgG+) or only the IgM LFA (IgM+ only) and corresponding serological values using the Ortho HTSA platform (left) or the S1 ELISA (center) and NP ELISA (right) plaforms. Signal to cutoff (S/co) for each assay is indicated. Median values and number of samples are shown

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