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. 2021 Apr 20;13(4):713. doi: 10.3390/v13040713

Figure 2.

Figure 2

Sequential antibody testing of UHS PCR-positive individuals for which sequential samples were available. Sequential samples from a group of PCR positive human patient sera from the University Hospitals Southampton NHS Figure 2. N ELISA, and (E,F) Whole Antigen ELISA. (A,C,E) Eleven individuals had two sequential samples; (B,D,F) seven individuals had three sequential samples. Dotted line represents test cut-off values of 2.83 IC50, 0.215 OD450nm, and 0.49 ΔOD450nm for the VNT, SARS-CoV-2-N ELISA, and Whole Ag ELISA, respectively.