I. Overview
Americans have faced flu vaccine shortage on multiple occasions. The demand for the vaccine outstripped supply when problems developing a new strain and safety and quality control issues delayed the vaccine delivery. In 2004-2005, two companies produced all the flu vaccine for the United States. Aventis and Chiron hoped to provide 100 million doses for the 2004-2005 flu seasons, but liked in recent years Americans have faced flu vaccine shortages on multiple occasions. By august 26, 2004, President Bush Administration announced and guarantied available flu vaccine. In august 27, 2014, one of the suppliers, Chiron announced contamination of 38 million doses of flu vaccine (nearly half the