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IntroductionIn June 2012, a highly pathogenic avian influenza (HPAI) virus, subtype H7N3, was identified as the cause of a severe disease outbreak in commercial layer farms in the Western State of Jalisco. Approximately 22.4 million birds died due to the infection or to the preventive stamping out of neighboring farms.6 On July 26, 2012, a national vaccination program was established using an inac ...