http://www.mohw.go.kr/upload/viewer/skin/doc.html?fn=1582510577747_20200224111617.docx&rs=/upload/viewer/result/202003/
https://www.who.int/docs/default-source/coronaviruse/situation-reports/20200313-sitrep-53-covid-19.pdf?sfvrsn=adb3f72_2