<prompt> Whihc of the following is true about meningococcal Meningitis-Case fatality less than 10 in untreated casesCases are main source of infectionRifampicin is the Drug of choiceTreatment in the first 2 days can save the life of 95 cases  <response>: Park;s texbook of Preventive and Social Medicine 23rd edition Page no:165 - 166 Fatality of typical untreated cases is about 80 Carriers are the most impoant source of infection. Clinical cases present only a negligible source of infection Penicillin is the drug of choice 