Figure 5.

(a) Neutralising antibodies detected by the SARS-CoV-2 RBD Inhibition ELISA (Positive ≥ 30% RBD inhibition). (b) Neutralisation titres in sera samples from 0, 2, 4, 7, 10, and 18 dpi determined by the live virus neutralisation assay. Data reported as values of reciprocal dilution of SNT₅₀ (mean ± SEM). The horizontal dotted lines indicate the cut-off value of the assay. Abbreviations: RBD, receptor-binding domain; SNT₅₀, serum virus neutralisation titre (reciprocal dilution) that showed 50% protection of virus growth.