Figure 3.

Correlation of endpoint titer and RT/33 and RT/66–99 between the pseudovirus neutralization assay (PsN) and live virus neutralization assay (Neut) methods. (A) Endpoint titer, wild-type (WT) strain, (B) Titers relative to 33, WT strain, (C) Titers relative to 66–99, WT strain, (D) Endpoint titer, Delta Variant, (E) Titers relative to 33, Delta Variant, (F) Titers relative to 66–99, Delta Variant. To assess the level of agreement between the PsN and Neut methods, correlations were estimated using the Row-wise method. Correlation coefficients were calculated using the endpoint titer and the titer relative to samples 33 and 66–99.