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A randomised crossover trial of facemask efficacy

 

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Feb 20045912436
Mar 20045113062
Apr 2004266833
May 2004629812
Jun 2004581058
Jul 200462851
Aug 200447668
Sep 200434386
Oct 2004233516
Nov 200429393
Dec 200414265
Jan 2005355027
Feb 2005232810
Mar 2005273013
Apr 200541411
May 2005111510
Jun 200581913
Jul 20059158
Aug 200571812
Sep 200562310
Oct 2005152114
Nov 200513228
Dec 20053165
Jan 20067205
Feb 20065107
Mar 2006192012
Apr 200671010
May 20065179
Jun 20068127
Jul 2006487
Aug 2006167
Sep 20064129
Oct 200641315
Nov 20065129
Dec 20065108
Jan 2007169
Feb 200711137
Mar 20074117
Apr 2007843
May 2007221
Jun 2007435
Jul 2007335
Aug 2007136
Sep 2007452
Oct 20078126
Nov 2007745
Dec 2007352
Jan 2008622
Feb 20082156
Mar 2008711
Apr 2008834
May 200821410
Jun 2008511
Jul 2008411
Aug 2008213
Sep 2008754
Oct 2008533
Nov 2008147
Dec 2008435
Jan 2009236
Feb 2009578
Mar 2009626
Apr 20091104
May 2009556
Jun 2009504
Jul 2009814
Aug 2009716
Sep 20091036
Oct 2009626
Nov 2009338
Dec 200910311
Jan 2010015
Feb 2010414
Mar 2010437
Apr 2010515
May 2010615
Jun 2010707
Jul 2010206
Aug 2010615
Sep 2010731
Oct 20101040
Nov 20101211
Dec 2010600
Jan 20111320
Feb 2011622
Mar 2011921
Apr 2011572
May 20111600
Jun 2011500
Jul 20111661
Aug 20111720
Sep 20111471
Oct 2011823
Nov 2011944
Dec 20111354
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Jul 20121986
Aug 201211810
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Jan 20132165
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Apr 201325611
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Jun 2013549
Jul 2013715
Aug 20137211
Sep 20131142
Oct 2013852
Nov 20131340
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Jan 2014725
Feb 20141618
Mar 20141440
Apr 20141149
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Jul 20141062
Aug 20141360
Sep 20141112
Oct 2014630
Nov 2014401
Dec 2014512
Jan 2015301
Feb 2015316
Mar 2015230
Apr 2015310
May 2015261
Jun 2015220
Jul 2015400
Aug 2015522
Sep 20151230
Oct 2015421
Nov 2015802
Dec 2015451
Jan 2016434
Feb 2016202
Mar 2016216
Apr 2016765
May 2016241
Jun 2016600
Jul 2016002
Aug 2016221
Sep 20161421
Oct 20161303
Nov 2016704
Dec 2016201
Jan 20171013
Feb 2017211
Mar 2017040
Apr 20170114
May 20170235
Jun 20174163
Jul 2017551
Aug 2017991
Sep 201710103
Oct 201711111
Nov 201715151
Dec 2017991
Jan 201810101
Feb 20181082
Mar 2018993
Apr 201818182
May 201811123
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Jul 201817171
Aug 201820203
Sep 201824243
Oct 201820204
Nov 201813131
Dec 201823231
Jan 201920201
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Mar 201914131
Apr 2019422
May 2019751
Jun 2019542
Jul 2019340
Aug 2019002
Sep 2019111
Oct 2019550
Nov 2019541
Dec 2019853
Jan 2020542
Total240523781130