Safety, Tolerability and Immunogenicity Study of AV7909 Anthrax Vaccine in Healthy Adults

Inclusion Criteria: * Be between 18 and 50 years of age, inclusive, at the time of enrollment. * Be in good health as determined by the investigator from medical history and a physical examination. * If a pre-menopausal female, must be using acceptable methods of birth control. * Have all hematology and chemistry parameters (measured at Screening) within the laboratory's normal range. * Have negative values for the following tests at Screening: Hepatitis C antibody, anti-Human Immunodeficiency Virus (Anti-HIV-1/-2/-O), and anti-Hepatitis B Core Antigen (Anti-HBc). * Be willing and capable of complying with all aspects of the protocol through completion of the required visits. * Have not donated blood in the preceding 8 weeks and are willing to not donate blood or plasma within 56 days after dosing. * Have adequate venous access for repeat phlebotomies. * Have read, understood and signed an informed consent form. Exclusion Criteria: Key Exclusion Criteria: * A known anaphylactic response, severe systematic response, or serious hypersensitivity reaction to a prior immunization. * Prior immunization with anthrax vaccine, recombinant Protective Antigen (rPA) vaccine, or known exposure to anthrax organisms. * Have previously served in the military or plans to enlist in the military from Screening through Day 84. * Have participated in anthrax therapeutic or vaccine trials (monoclonal anti-protective antigen (PA) or anthrax immune globulins or anthrax vaccines). * Participation…