All datasest names have prefix - data source and suffix - date when the data was acquired (yymmdd), separated with underscore.
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European Centre for Disease Prevention and Control (ecdc)
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Our World in Data (owid)
https://covid.ourworldindata.org/data/full_data.csv
Based on WHO Situation Reports (https://www.who.int/emergencies/diseases/novel-coronavirus-2019/situation-reports/)