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. 2020 Mar 20;5:26. doi: 10.1038/s41541-020-0176-7

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Fig. 4 — Juvenile interferon-receptor knockout mice expressing the human poliovirus receptor were inoculated i.p. with either Sabin OPV2 or nOPV2-CD at a range of doses. Neutralizing antibody titers were determined in sera at day 21 post-infection. Human sera collected from a polio-immunized individual served as a positive assay control. Titers for individual animals are shown, with error bars indicating standard error of the mean (SEM). n = 10 weight- and sex-matched mice per group. All P-values were determined by a two-tailed Mann-Whitney U-test. *P = 0.0230.