2010-2011 influenza seasonal vaccine, preliminary mid-season effectiveness estimates: reason for concern, confounding or are we following the right track?

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2010-2011 influenza seasonal vaccine, preliminary mid-season effectiveness estimates: reason for concern, confounding or are we following the right track?
J Puig-Barberà¹
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Affiliations: ¹ Vaccines Research Unit, Centre for Public Health Research, Valencia, Spain

Correspondence:
J Puig-Barberà
puig_joa gva.es
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Citation style for this article: Puig-Barberà J. 2010-2011 influenza seasonal vaccine, preliminary mid-season effectiveness estimates: reason for concern, confounding or are we following the right track?. Euro Surveill. 2011;16(11):pii=19821. https://doi.org/10.2807/ese.16.11.19821-en Received: 14 Mar 2011