Antecedentes.

http://socioecohistory.wordpress.com/2009/03/07/live-avian-flu-virus-placed-in-baxter-vaccine-materials-sent-to-18-countries/

http://www.torontosun.com/news/canada/2009/02/27/8560781.html

http://www.rafapal.com/?p=1686

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