https://www.prospectmagazine.co.uk/magazine/margaret-macmillan-black-death-covid-19-lessons-history
http://www.ilo.org/wcmsp5/groups/public/—dgreports/—cabinet/documents/genericdocument/wcms_371208.pdf
https://www.thelancet.com/action/showPdf?pii=S1473-3099%2820%2930144-4
https://www.bbc.com/news/world-europe-52537573