system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Xavier and yogender stay in the same hostel of same university. Xavier develops infection due to group B meningococcus. After few days yogender develops infection due to Group C meningococcus. All of the following are true statements except -
assistant
The correct answer is  Park&;s texbook of Preventive and Social Medicine 23rd edition Page no: 166 Currently available meningococcal vaccines include polysaccharide vaccines and polysaccharide-protein conjugate vaccines. Both vaccines are available against meaningococci of serogroup A, C, W135 and Y