DL 1.3.8. Weekly  validation of datasets;  datasets and production  of weekly  epidemiological data  summary/report/  bulletin. Collection (as needed) and validation of dataset. This is foreseen as a regular  and constant activity through the course of the project.  Deliverable includes scripts, datasets and epidemiological data summary.  Format to be agreed during monthly teleconferences. The validation of the datasets will be performed in close collaboration with the  countries/study sites and will be aimed to build capacity and foster a  progressive improvement of data reported by the countries/study sites over  the course of the framework contract. Communication between the contractor  and the countries/sites to validate the data will take place using principles  agreed between the contractor and ECDC and periodically revisited.  On a weekly basis  Word; Excel, csv, html  DL 1.3.9. Regular  validation of vaccine  effectiveness datasets;  datasets and production  of regular  epidemiological data  summary.  Collection (as needed) and validation of dataset. This is foreseen as a regular  and constant activity through the course of the project.  Deliverables includes scripts, datasets and epidemiological data summary.  Format to be agreed during monthly teleconferences; cumulative data  presented since the beginning of data collection. The format of the  epidemiological data summary will be agreed with ECDC.  The validation of the datasets will be performed in close collaboration with the  countries/study sites and will be aimed to build capacity and foster a progressive  improvement of data reported by the countries/sites over the course of the  project. Communication between the contractor and the countries/sites to  validate the data will take place using principles agreed between the contractor  and ECDC and periodically revisited. On a monthly basis Word; Excel, csv. html  DL 1.3.10. Regular  laboratory results  summary table  Production of regular laboratory results summary table to ECDC specifying the  number of laboratory specimens processed and tested and the proportion of  positive samples by study site, stratified by key variables. This deliverable  includes all costs of sample processing, transport, laboratory data management  and the diagnostic assay and refers to cost of performing the molecular  diagnostic (i.e. RT-PCR) and serology, including standardization. The format of  On a monthly basis  starting 2 months  after first specific  contract signature  Word  Excel or other  statistical software  Vaccine Effectiveness, Burden and Impact Studies (VEBIS) of COVID-19 and Influenza – Tender Specifications ECDC/2021/12924 