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Section 1 Criteria for selection of communicable diseases and related special health issues to be covered by epidemiological surveillance within the network for epidemiological surveillance Union surveillance shall provide information for public health action at Union level. More specifically, one of the following criteria shall be met: 1. significant morbidity, significant mortality or emerging disease (increasing five-year trend) in a sizeable percentage of Member States; 2. potential to cause cross-border outbreaks; 3. high-threat pathogen (transmissibility and severity); 4. specifically targeted national or Union public health programmes in place that require monitoring and evaluation; 5. Union surveillance adds public health value to national surveillance systems other than what is implied in criteria 1 to 4. Section 2 Criteria for use in the definition and classification of cases: 1. clinical criteria; 2. laboratory criteria; 3. epidemiological criteria. Classification of cases: 1. possible case; 2. probable case; 3. confirmed case. Section 3 Procedures for the operation of the network for epidemiological surveillance

1. membership and appointment; 2. terms of reference (detailing responsibilities of the national representatives and the ECDC secretariat of the network, including roles and tasks); 3. administrative, for example relating to the convening of meetings and decision-making, and technical work procedures, for example relating to data reporting mechanisms, tools and platforms, data analysis and dissemination; and 4. mechanism for periodic evaluation/review of administrative and technical work procedures.