Vaccine IgG1 IgG2a aroQ B. pertussis 50 80 DTaP 220 0 Values shown represent reciprocal endpoint titre

Table 1: IgG1 and IgG2a antibody titres against whole-cell B. pertussis [BPWC] Tohama I of pooled lung homogenates of mice vaccinated with a single dose of aroQ B. pertussis or 3 doses of DTaP vaccine.