Pinto Leite, PedroRodrigues, Ana PaulaGuiomar, Raquel2019-02-122019-02-122018-11-21http://hdl.handle.net/10400.18/5749In this study we took advantage of the Portuguese Influenza Surveillance Systems (ISS) database to assess and compare the performance of the two main case definitions used in Portugal: the European Centre for Disease Prevention and Control (ECDC) ILI case definition and the International Classification of Primary Care (ICPC) R80 code.engInfluenza SurveillanceILI Case DefinitionICPC R80 CodeECDCInfluenza-like IllnessGripeVigilânciaEstados de Saúde e de Doençaconference object