Between June 1 and July 31 2009 113 patients were admitted in our PICU, 79 of them with respiratory pathology. Twenty presented positive PCR (polymerase chain reaction) by Influenza A H1N1and 22 presented positive IFI (indirect immunofluorescence) by RSV (respiratory syncitial virus). Out of the 69 patients who survived 3 presented difficult weaning and needed tracheostomy.