Fig. 1.

Serum IgG response against pertussis toxin (PT) at the time of the fifth dose of DTaP and 4 to 8 weeks later as measured by the Serion ELISA classic. The boxes span the 25th to 75th percentiles, the whiskers indicate the 10th and 90th percentiles, and the bullets represent the individual outliers. n=80 and 75 in pre- and postvaccination groups, respectively. The scatter plot shows the PT-IgG distribution of the 75 paired pre- and postvaccination sera. The diagonal represents line of identity. Results are from one experiment.