Within four years, say some historians, the plague spread throughout Europe and about a third of the population lost their life ​ — perhaps between 20 million and 30 million people.
Ajaloolaste väitel levis katk nelja aastaga kõikjale Euroopasse ning elu kaotas umbes kolmandik rahvastikust – arvatavasti 20 – 30 miljonit inimest.