Table 1 Demographic details of subjects in trial (intention to treat analysis)

Antigen (µg) 5 10 20 40

Mean (SD) age (years) 36 (12.0) 39 (11.5) 37 (11.8) 40 (11.9)
No of men/women 8/17 15/10 15/10 12/13
Mean weight (SD) (kg) 72.0 (15.5) 74.6 (13.0) 77.0 (14.8) 76.0 (14.7)
Median No of previous inoculations 5 5 5 6
Ethnic group:
 White 23 23 23 23
 Black 1 1 1
 Chinese 1 1
 Asian 1 1 1