Meningococcal vaccines
Meningococcal vaccines include Meningococcal Group B (MenB), Meningococcal C (MenC) and Quadrivalent Meningococcal ACWY (MenACWY) vaccines. The majority of MenC and MenACWY vaccines used in clinical practice contain modified diphtheria (CRM 197) or tetanus toxoid as carrier. Hypersensitivity reactions following MenACWY or MenB vaccines administration, including anaphylaxis, have been reported43,44. Previous severe hypersensitivity reactions to the vaccine or to its components, mainly tetanus or diphtheria toxoid, are the only allergic contraindications to Meningococcal vaccines.