Table 5.

Immunization Status of the Pertussis Polymerase Chain Reaction–Positive Infants

Age	Total Cases	Information Available	DTaP Dose 1 (6 wk)	DTaP Dose 2 (10 wk)	DTaP Dose 3(14 wk)
0–6 wk	11	…	0	0	0
7–10 wk	21	17	11a	0	0
11–14 wk	4	2	2	2b	0
>14 wk	6	5	5	4c	2d

Data are presented as No.; immunization status was ascertained by review of the immunization cards.

Abbreviation: DTaP, pentavalent vaccine containing diphtheria toxoid, tetanus toxoid, acellular pertussis, trivalent inactivated polio vaccine, and Haemophilus influenzae type b conjugate vaccine.

^a Seven pertussis admissions ≤14 days postvaccination.

^b Two pertussis admissions ≤14 days postvaccination.

^c One pertussis admission ≤14 days postvaccination.

^d One pertussis case missed the 10-week dose.