@techreport{World Health Organization2020,
author = {World Health Organization},
title= {Coronavirus disease 2019 (COVID-19). Situation Report – 140 21-04-2020},
year = {2020},
URL = {https://www.who.int/docs/default-source/coronaviruse/situation-reports/20200608-covid-19-sitrep-140.pdf?sfvrsn=2f310900_2},
}