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. 2018 Oct 30;67(Suppl 1):S42–S50. doi: 10.1093/cid/ciy603

Figure 5.

Figure 5.

Intestinal immunity to polio type 2 at the time of and 2 weeks after monovalent oral polio vaccine type 2 challenge (ie, 28 and 30 weeks of age) by reported duration of breastfeeding. P values are from Mann-Whitney U tests comparing the distributions of immune markers by breastfeeding category. Horizontal black bars indicate the median levels. Blue, circle-shaped markers indicate infants immunized with IPV-bOPV-bOPV (n = 48); orange, triangle-shaped markers indicate infants immunized with IPV-IPV-bOPV (n = 54); and red, square-shaped markers indicate infants immunized with IPV-IPV-IPV (n = 50). Abbreviations: bOPV, bivalent oral polio vaccine; IgA, immunoglobulin A; IPV, trivalent inactivated polio vaccine; mOPV2, monovalent oral polio vaccine type 2.