Distinct early cellular kinetics in participants protected against colonization upon Bordetella pertussis challenge.

However, plasma cells showed a trend toward increased cell numbers on D11–D14 after challenge (ratio vs. baseline); this expansion was observed in all isotypes ( Figure 4, B–I , and Supplemental Figure 5A ) and more prominent in participants inoculated with 1 × 10 5 CFU ( Supplemental Figure 5B , trend).

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