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Analysis of mucosal viral RNA levels and antibody responses to Delta and Omicron breakthrough infections during pregnancy. Samples were classified according to infecting strain (Delta or Omicron), pregnancy status, and vaccination status and reanalyzed to assess differences in viral RNA level (A) and anti-S (ancestral/vaccine strain) IgG AUC (B). Two-way ANOVA with Tukey’s multiple comparisons tests (A and B). *P < 0.05.
