Among controls , SBA titers were 1:4 in 4 % ( H44/76 , 5/99 ) , 0 % ( NZ98/254 ) and 67 % ( M10713 ) at baseline , increasing to 100 % ( H44/76 and 5/99 ) , 89 % ( NZ98/254 ) and 97 % ( M10713 ) postimmunization .