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 the following are true statement 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 Yogendra