At the time of the COVID-19 pandemic, providing access to data (properly optimised regarding personal data protection) plays a crucial role in providing the general public and media with up-to-date information. Open datasets also represent one of the means for evaluation of the pandemic on a global level. The primary aim of this paper is to describe the methodological and technical framework for publishing datasets describing characteristics related to the COVID-19 epidemic in the Czech Republic (epidemiology, hospital-based care, vaccination), including the use of these datasets in practice. Practical aspects and experience with data sharing are discussed. As a reaction to the epidemic situation, a new portal COVID-19: Current Situation in the Czech Republic (https://onemocneni-aktualne.mzcr.cz/covid-19) was developed and launched in March 2020 to provide a fully-fledged and trustworthy source of information for the public and media. The portal also contains a section for the publication of (i) public open datasets available for download in CSV and JSON formats and (ii) authorised-access-only section where the authorised persons can (through an online generated token) safely visualise or download regional datasets with aggregated data at the level of the individual municipalities and regions. The data are also provided to the local open data catalogue (covering only open data on healthcare, provided by the Ministry of Health) and to the National Catalogue of Open Data (covering all open data sets, provided by various authorities/publishers, and harversting all data from local catalogues). The datasets have been published in various authentication regimes and widely used by general public, scientists, public authorities and decision-makers. The total number of API calls since its launch in March 2020 to 15 December 2020 exceeded 13 million. The datasets have been adopted as an official and guaranteed source for outputs of third parties, including public authorities, non-governmental organisations, scientists and online news portals. Datasets currently published as open data meet the 3-star open data requirements, which makes them machine-readable and facilitates their further usage without restrictions. This is essential for making the data more easily understandable and usable for data consumers. In conjunction with the strategy of the MH in the field of data opening, additional datasets meeting the already implemented standards will be also released, both on COVID-19 related and unrelated topics.

Department of Anaesthesiology Perioperative Medicine and Intensive Care Masaryk Hospital in Ústí nad Labem Ústí nad Labem Czech Republic

Department of Nephrology 1st Faculty of Medicine Charles University Prague Czech Republic

Department of Preventive Cardiology Institute for Clinical and Experimental Medicine Prague Czech Republic

Faculty of Biomedical Engineering Czech Technical University Kladno Czech Republic

Faculty of Informatics Masaryk University Brno Czech Republic

Institute of Biostatistics and Analyses Faculty of Medicine Masaryk University Brno Czech Republic

Institute of Health Information and Statistics of the Czech Republic Prague Czech Republic

Jan Evangelista Purkyně University Ústí nad Labem Czech Republic

Medical Simulation Centre Faculty of Medicine Masaryk University Brno Czech Republic

Ministry of Health of the Czech Republic Prague Czech Republic

National Institute of Public Health Prague Czech Republic

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ABCA3 and LZTFL1 Polymorphisms and Risk of COVID-19 in the Czech Population

COVID-19: years of life lost (YLL) and saved (YLS) as an expression of the role of vaccination