1. World Health Organization [homepage on the Internet]. Novel coronavirus (2019-nCoV) situation report-522020; 2020. Available from: https://apps.who.int/iris/bitstream/handle/10665/331476/nCoVsitrep12Mar2020-eng.pdf?sequence=1&isAllowed=y. Accessed January 2, 2021.
2. World Health Organization [homepage on the Internet]. Novel coronavirus (2019-nCoV) situation report-742020; 2020. Available from: https://www.who.int/docs/default-source/coronaviruse/situation-reports/20200403-sitrep-74-covid-19-mp.pdf?sfvrsn=4e043d03_4. Accessed January 2, 2021.
3. World Health Organization [homepage on the Internet]. Weekly operational update on COVID-19; 2021. Available from: https://www.who.int/publications/m/item/weekly-operational-update-on-covid-19---9-august-2021. Accessed August 14, 2021.
4. Early Clinical and CT Manifestations of Coronavirus Disease 2019 (COVID-19) Pneumonia
5. Laboratory abnormalities in patients with COVID-2019 infection