Flu facts were gathered from the Centers for Disease Control and Prevention, the Public Health Agency of Canada, and Alberta's Seasonal Influenza 2011–2012 Summary Report
http://www.cdc.gov/flu/about/disease/index.htm http://www.phac-aspc.gc.ca/influenza/influenza-undrstnd-eng.php#1 http://www.health.alberta.ca/professionals/influenza-evidence.html