There was no statistically significant difference in day 42 hemagglutination inhibition seroconversion after mixing adjuvant with either the first or both 15 g doses ( n = 34 [ 35 % ; 95 % CI , 25 % -45 % ] vs n = 47 [ 47 % ; 95 % CI , 37 % -58 % ] , respectively ; P = .10 ) .