Research Article

Protection against pertussis by immunisation.

Br Med J 1980; 281 doi: https://doi.org/10.1136/bmj.281.6252.1390 (Published 22 November 1980) Cite this as: Br Med J 1980;281:1390

Article usage

Article metrics provide readers and authors with an indication of how often a specific article has been accessed month by month. It counts three formats - abstract/extract, full text and pdf. The page is updated each day.

Usage statistics: March 2009 to February 2018

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AbstractFullPdf
Mar 2009200
Apr 2009100
Jun 2009100
Jul 2009001
Sep 2009400
Jan 2010400
Feb 2010201
Mar 2010400
Apr 2010201
May 2010100
Jun 2010200
Jul 2010201
Aug 2010204
Sep 2010500
Oct 2010401
Nov 2010203
Dec 2010101
Jan 2011001
Feb 2011502
Mar 2011302
Apr 2011101
Jun 2011100
Aug 2011001
Sep 2011001
Oct 2011201
Dec 2011101
Jan 2012201
Feb 2012100
Mar 2012300
May 2012100
Jun 2012200
Aug 2012201
Oct 2012300
Sep 2013001
Apr 2014301
Jul 2014206
Sep 2014100
Dec 2014001
Mar 2015003
Apr 2015100
May 2015303
Jun 2015200
Jul 2015100
Aug 2015100
Sep 2015200
Nov 2015502
Dec 2015600
Jan 2016703
Feb 2016301
Mar 2016002
Jun 2016201
Aug 2016301
Sep 2016002
Oct 2016300
Dec 2016100
Jan 2017200
Feb 2017001
Mar 2017401
Apr 2017201
May 2017902
Jun 2017300
Jul 2017301
Aug 2017201
Sep 2017200
Oct 2017101
Nov 2017101
Dec 2017101
Jan 2018400
Feb 2018100
Total147062