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Two States Accuse Aventis on Flu Vaccine  CHICAGO (Reuters) - The governors of Illinois and New  Mexico accused French drug maker Sanofi-Aventis &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=SASY.PA target=/stocks/quickinfo/fullquote"&gt;SASY.PA&lt;/A&gt; of  balking in providing data to U.S. regulators in the states'  attempts to secure flu vaccine in the midst of a national  shortage. 