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Exhibit 21.1
 
Subsidiaries of Biovest
 
Biovest International, Inc. (“Biovest”) has two direct subsidiaries. Biovest holds all of the issued and outstanding equity securities of Biovest Europe, Ltd., a corporation registered in the United Kingdom.  The issued and outstanding equity securities of ViraCell Advanced Products, LLC, a Texas corporation, is held as follows:  85% by Biovest, 10% by Samuel S. Duffey, Biovest’s former Chief Executive Officer, and 5% by J. David Gangemi, Ph.D.