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Number of coughing episodes (≥7 days) in relation to CMI status
| CMI statusa | B. pertussis antigen | No. of subjects tested | Mean no. (range) of coughing episodes/person/yrb |
|---|---|---|---|
| Converters | PT | 13 | 0.6 (0–4) |
| PRN | 15 | 0.7 (0–4) | |
| FHA | 9 | 0.6 (1–4) | |
| Nonconverters | |||
| PT | 15 | 0.5 (0–5) | |
| PRN | 8 | 0.6 (0–5) | |
| FHA | 13 | 0.7 (0–5) |
At 48 months of age; all negative at 7 months of age.
Lasting ≥7 days.
