Comment on

• Effectiveness of AS03 adjuvanted pandemic H1N1 vaccine: case-control evaluation based on sentinel surveillance system in Canada, autumn 2009.

  Skowronski DM, Janjua NZ, De Serres G, Hottes TS, Dickinson JA, Crowcroft N, Kwindt TL, Tang P, Charest H, Fonseca K, Gubbay JB, Bastien N, Li Y, Petric M. Skowronski DM, et al. BMJ. 2011 Feb 3;342:c7297. doi: 10.1136/bmj.c7297. BMJ. 2011. PMID: 21292718 Free PMC article.