Letters
A/H1N1 pandemic
Case definition is too loose
BMJ 2009; 339 doi: https://doi.org/10.1136/bmj.b3365 (Published 18 August 2009) Cite this as: BMJ 2009;339:b3365Article 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.