TABLE 3 Number of Laboratory-Confirmed B pertussis Infections in Children Aged 3 to 6 Years by Duration and Type of Cough and by Vaccine Received Cough and Duration Vaccine Received Total DTaP SB DTaP CB DT Any cough 7 d 138 (100%) 126 (100%) 127 (100%) 391 (100%) Spasmodic cough 14 d or any cough 21 d 115 (83%) 103 (82%) 117 (92%) 335 (86%) Spasmodic cough 21 d 33 (24%) 33 (26%) 54 (43%) 120 (31%)

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