Time frame: At 1 month after the first rMenB+OMV NZ vaccination (i.e at Day 31) relative to baseline (i.e. Day 1)
The immune response to rMenB+OMV NZ vaccine is evaluated by measuring bactericidal activity against each of N. meningitidis serogroup B test strains (M14459 [fHbp], 96217 [NadA], NZ98/254 [PorA] and M13520 [NHBA]) in terms of the Four-fold increase defined as: - For a pre-vaccination titer < limit of detection (LOD), a post-vaccination titer of >= 4-fold the LOD or >= LLOQ, whichever is greater, - For a pre-vaccination titer >= LOD but <LLOQ, a post vaccination titer of at least 4-fold the LLOQ, - For a pre-vaccination titer >= LLOQ, a post vaccination titer of at least 4-fold the pre-vaccination titer.