1. 1. World health Organization. Coronavirus disease 2019 (COVID-19): Situation Report – 39. 2020. https://www.who.int/docs/defaultsource/coronaviruse/situation-reports/20200228-sitrep-39-covid-19.pdf?sfvrsn=5bbf3e7d_4 [date access 10.06.2021]
2. 2. Worldometer. COVID-19 coronavirus pandemic. https://www.worldometers.info/coronavirus/ [date access 10.06.2021]
3. 3. Ministerstvo okhorony zdorov’ya Ukrainy. Aktualno pro COVID-19 [Ministry of Health of Ukraine. Update about COVID-19]. https://moz.gov.ua/koronavirus-2019-ncov. (in Ukrainian). [date access 12.06.2021]
4. 4. Minfin Ukrainy. Koronavyrus v Ukrayny [Ministry of Finance of Ukraine. Coronavirus in Ukraine]. https://index.minfin.com.ua/reference/coronavirus/ukraine. (in Ukrainian). [date access 14.06.2021]
5. 5. VOOZ. Koronavyrus COVID-19 [WHO. COVID-19 coronavirus]. https://www.who.int/ru/emergencies/diseases/novel-coronavirus-2019. (in Ukrainian). [date access 3.06.2021]