664Influenza Vaccination in Chronically Ill Children: Taking a Closer Look at LAIV

(1)Division of Infectious Diseases; Department of Pediatrics, The Montreal Children's Hospital, Montreal, QC, Canada, (2) Ministere de la Sante et des Services Sociaux du Quebec, Montreal, QC, Canada, (3)Vaccine Study Centre, Research Institute of the McGill Univ. Health Centre, Montreal, QC, Canada, (4)Institut national de sante publique du Quebec, Montreal, QC, Canada, (5)Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, QC, Canada.