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 -
Educate students about meningococcal transmission and take preventive measures Chemoprophylaxis to all against both group B and group C Vaccine prophylaxis of contacts of xavier Vaccine prophylaxis of contacts of yogender