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Original research
Current smoking and COVID-19 risk: results from a population symptom app in over 2.4 million people
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AbstractFullPdf
Jan 2021984897381228
Feb 202175637533562
Mar 202111630115661024
Apr 202187508647602
May 202167546627515
Jun 202144994431439
Jul 202125772528242
Aug 202116851632161
Sep 202117291653222
Oct 202113101254205
Nov 202112771202180
Dec 202119321882181
Jan 202211761146155
Feb 2022661622139
Mar 2022659614110
Apr 2022391354146
May 202235230376
Jun 202234731968
Jul 202235735263
Total63497624036318