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. 2020 Jul;26(7):1478–1488. doi: 10.3201/eid2607.200841

Figure 2.

Figure 2

Correlations between ODs of ELISAs and PRNT results for PCR-confirmed COVID-19 patients. A) S; B) S1; C) S1A; D) RBD; E) N. Ten serum samples were collected 6–27 days after diagnosis from 3 COVID-19 patients in France. Dots indicate patients. Dotted horizontal lines indicate ELISA cutoff values. COVID-19, coronavirus disease 2019; N, nucleocapsid; OD, optical density; PRNT50, 50% plaque reduction neutralization test; RBD, receptor-binding domain; S, spike; SARS-CoV-2, severe acute respiratory syndrome coronavirus 2.