Arch One Client Secures Order from United Nations                     12/31/2005

Washington, DC, 12/31/2005 - BioDefense Corporation received a purchase order from the United Nations for its MailDefender® systems along with an associated maintenance contract. The machines will be used to kill biological pathogens in the mail to significantly increase its safety profiles for United Nations employees.

BioDefense Chairman Michael Lu commented "This important milestone now places BioDefense Corporation on an international stage to carry our mission of reducing the risk of an attack by terrorism or infections from mutating viruses."