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COVID-19: some unanswered questions
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Online download statistics by month: May 2020 to January 2021

AbstractFullPdf
May 202029928368
Jun 202015515040
Jul 2020969519
Aug 20201091095
Sep 202056149673
Oct 202020221224
Nov 202014914522
Dec 202085857
Jan 202110610512
Total17621680270