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SARS-CoV-2 Omicron pseudoviruses demonstrate a substantial increase in infectivity. a, b The relative infection ability of these spike variants packaged pseudoviruses (a) and heatmap showing p-values from pairwise comparisons of the relative fusion levels between the two pseudoviruses (b). A two-tailed Kruskal–Wallis test with a false discovery rate for multiple comparisons
