Figure 1.

Reverse cumulative distribution functions of poliovirus type 2–specific stool neutralizing activity and immunoglobulin A (IgA) levels before and after receiving nOPV2-c1 (n = 15) (A, B) or nOPV2-c2 (n = 15) (C, D). Because stool samples were not available for all participants on all days, we described the aggregate of the measurements obtained from samples collected on days −2 to 0 (before vaccination) for day 0, days 12–16 for day 14, days 19–23 for day 21, and days 26–30 for day 28. If ≥2 stool samples were collected within each window for a given participant, we calculated the geometric mean of the stool neutralization titer or IgA mean fluorescence intensity (MFI).