TABLE 2.

Proportion and number of seroresponders to the vaccine strain (44/76) in the SBA

GroupVariableResult at the indicated time
6 wk after 2nd dose6 wk after 3rd dose10 mo after 3rd dose6 wk after 4th dose1 yr after 4th dose
MenBvac% Responders (95% CI)49 (42-55)61 (54-67)25 (19-31)90 (85-93)59 (51-66)
No. of responders/total no. of subjects109/224132/21851/208181/202110/188
Placebo% Responders (95% CI)0 (0-3)0 (0-3)3 (1-8)4 (1-9)4 (1-11)
No. of responders/total no. of subjects0/1180/1163/1094/1074/94