Fig. 2: Geometric mean neutralizing titers (GMT50) against WA-1 versus Omicron BA.1 by study.

a unvaccinated convalescent plasma and b vaccinated plasma with or without COVID-19. Geomeans for entire study groups with neutralization of WA-1 in filled circles and of Omicron BA.1 in empty circles with geomeans (geometric standard deviation for error bars), fold reduction (FR) above data, and number of studies above x axis. All geomeans are not statistically significant in difference by multiple comparisons in Tukey’s test. Source data are provided as a Source Data file.