Figure 5.
Neutralization of SARS-CoV-2 variants of concern. (A) NHP were vaccinated as described in Figure 1 . Two weeks following the second administration, vaccine-induced antibodies were tested for their capacity to neutralize Wuhan-like SARS-CoV-2 (FR-4286) as well as the alpha (B.1.1.7), beta (B.1.351), and delta variants (B1.617.2) by PRNT. Filled circles represent PRNT50 titers of individual NHP, and columns depict the GMT of the group +/geometric standard deviation. Kruskal–Wallis test showed no statistically significant differences between the neutralization of Wuhan-like FR-4286 and the variants. (B) Ten human plasma samples positive for SARS-CoV-2 antibodies (human convalescents) were analyzed for comparison.