SIGA Technologies, Inc. is engaged in the development and commercialization of solutions for various unmet medical needs and biothreats. The Company's lead product is TPOXX, an orally administered antiviral drug that targets orthopoxviruses infections. TPOXX is a small-molecule drug delivered to the Strategic Stockpile under the Project BioShield Act of 2004 (Project BioShield). TPOXX is an investigational product that is not approved by the United States Food and Drug Administration (FDA) as a treatment of smallpox or any other indication. The Company relies on and uses third parties known as contract manufacturing organizations (CMOs) to procure commercial raw materials and supplies, and to manufacture TPOXX. The Company identified a lead pre-clinical drug candidate with activity against four serotypes of the virus and which has shown efficacy in a murine model of disease.