<qa>  What is the failure rate of IV antibiotic treatment of children treated at home?PRIMARY OBJECTIVE To compare the failure rate of IV antibiotic treatment of children treated at home iv ceftriaxone with those treated in hospital iv flucloxacillin in the first 2 days of treatment following the first dose given in the ED in children with moderatesevere cellulitis Moderatesevere: defined in this study, as those assessed by ED doctor to need iv antibiotics 