With the development of conjugate vaccines, Neisseria meningitidis serogroup B (MenB) will remain the major cause of meningitis, as it is not covered by vaccination. In order to develop a vaccine able to confer a broad cross-protection against invasive MenB strains, we have developed a new generation of outer-membrane vesicles (OMVs) based on the over-expression of well conserved minor outer membrane proteins (OMPs) and the presence of high percentage of detoxified LOS.
