Extension Study of V72P13 to Evaluate the Safety, Tolerability and Immunogenicity of Novartis Meningococcal B Recombinant Vaccine When Administered as a Booster or as a Two-dose Catch-up to Healthy Toddlers

Immunogenicity was assessed in terms of the percentage of subjects as measured by serum bactericidal antibody titers ≥1:5 the lower limit of the two-sided 95% confidence interval (CI) was ≥75%, directed against N.meningitidis serogroup B reference strains H44/76-SL , NZ98/254, 5/99, one month after the booster (fourth) dose of meningococcal B vaccine with or without the concomitant Measles, Mumps, Rubella, Varicella (MMRV) vaccine in toddlers who were previously vaccinated with three doses of Meningococcal B vaccine.

Immunogenicity was assessed to demonstrate non-inferiority in terms of percentages of subjects as measured by antibody responses against MMRV vaccine when given concomitantly with the booster (fourth) dose of rMenB+OMV NZ vaccine at 12 months of age when compared to MMRV vaccine when given alone.

The specified cut-off levels for the vaccine antigens : for measles antigen is ≥255mIU/mL, Mumps antigen is ≥10 Enzyme Linked Immunosorbent Assay(ELISA) Antibody(Ab) units, Rubella antigen is ≥10 IU/mL, Varicella antigen is ≥1.25 glycoprotein (gp) ELISA units/ml (seroconversion) and varicella antigen is ≥5 gp ELISA units/ml (seroprotection.

The human serum bactericidal antibody (hSBA) titer responses, one month after receiving booster dose or rMenB+OMV NZ vaccination, are reported as geometric mean titers (GMTs).

The immunogenicity was assessed as the persistence of bactericidal antibodies at 12 months of age (pre-dose 4) who previously received three doses of rMenB+OMV NZ in the parent study as measured by hSBA GMTs directed against N meningitidis serogroup B reference strains H44/76, NZ98/254 and 5/99.

Immunogenicity was assessed to evaluate the persistence in terms of percentages of subjects with hSBA titers ≥ 1:5, previously received three doses of rMenB+OMV NZ directed against N meningitidis serogroup B reference strains H44/76, NZ98/254 and 5/99.

The immunogenicity was assessed to demonstrate the induction of immunological memory in subjects who were previously received three doses of rMenB+OMV NZ as measured by SBA GMT response in comparison to the fourth dose of rMenB+OMV NZ at 12 months of age ( 12B12M(1a) group) to the response in subjects (12M12B14B 0 who received a single dose of rMenB+OMV NZ vaccine.

The immunogenicity of a two-dose catch-up schedule of rMenB+OMV NZ given at 13 and 15 months (12M13B15B) or 12 and 14 months (12M12B14B) to naïve toddlers was assessed by SBA GMTs one month after the second dose.

The immunogenicity of a two-dose catch-up schedule of rMenB+OMV NZ given at 13 and 15 months (12M13B15B) or 12 and 14 months (12M12B14B) to naïve toddlers was assessed as percentages of subjects with SBA titers ≥1:5 one month after the second dose.

The immune response against vaccine antigen 287-953 was measured by ELISA, one month after the fourth (booster) dose given at 12 months of age (groups 12B12M (1a), 12B13M (1b).

The immune response against vaccine antigen 287-953was measured by ELISA one month after the first dose and one month after the second dose of a two-dose catch-up regimens (12M13B15B and 12M12B14B) in toddlers.

The immune response was measured as percentages of subjects with SBA ≥ 1:5 (95% CI) against strain M10713, one month after the fourth (booster) dose given at 12 months of age (groups 12B12M (1a), 12B13M (1b).

Safety was assessed as the number of subjects who reported solicited local and systemic reactions from day 1 through day 7 after rMenB+OMV NZ vaccination administered at 12 months. For the safety analysis purpose, Groups 12B12M (1a) and 12B12M (3a) are combined as Group 12B12M and Groups 12B13M (1b) and 12B13M (3b) are combined as Group 12B13M.

Safety was assessed as the number of subjects who reported solicited local and systemic reactions from day 1 through day 7 after rMenB+OMV NZ vaccination administered with a two-dose catch-up schedules (groups 12M13B15B and 12M12B14B).

Safety was assessed as the number of subjects who reported solicited local reactions from day 1 through day 7 after the MMRV vaccination concomitantly with rMenB+OMV NZ at 12 months of age (groups 12B12M, 12M12B14B, 12B12M_C) or after MMRV vaccination alone without rMenB+OMV NZ at 12 months (Group 12M13B15B). For the safety analysis purpose, Groups 12B12M (1a) and 12B12M (3a) are combined as Group 12B12M.

Safety was assessed as the number of subjects who reported solicited systemic reactions from day 8 through day 28 after the MMRV vaccination concomitantly with rMenB+OMV NZ at 12 months of age (groups 12B12M, 12M12B14B, 12B12M_C) or after MMRV vaccination alone without rMenB+OMV NZ at 12 months (Group 12M13B15B). For the safety analysis purpose, Groups 12B12M (1a) and 12B12M (3a) are combined as Group 12B12M.