Xavier and yogender stayed in the same hostel of the same university. Xavier develops an infection due to group B meningococcus. After few days yogender develops an infection due to Group C meningococcus. All of the following are true statements except
Educate students about meningococcal transmission and take preventive measures Chemoprophylaxis to all againts both group B and group C Vaccine prophylaxis of contacts of xavier Vaccine prophylaxis of contacts of yogendra