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Influenza vaccination order rates for the intervention and control practices before and after active choice implementation. Percentage of patients with an order placed for the influenza vaccination at the intervention practice (gray dashed line) and the two control practices (black solid line) for the following influenza seasons: pre-intervention year 2 (Sept 2010 to March 2011), pre-intervention year 1 (Sept 2011 to March 2012), and post-intervention year (Sept 2012 to March 2013).
