Counting the Cost of Pandemics:Spanish Flu vs COVID-19 
Leon Piterman,Marika Vicziany1,LIN Chuling(translator),HUANG Wenjing(translator),YANG Hui(translator)
Chinese General Practice . 2021, (13): 1592 -1596 .  DOI: 10.12114/j.issn.1007-9572.2021.00.036