Ciprofloxacin BioThrax Co-Administration Study

Inclusion Criteria:

• Be between 18 and 45 years of age, 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.
• Be willing and able to return for all follow-up visits and blood and urine collections for the duration of the trial
• Be willing and able to complete a web-enabled electronic diary and report concomitant medications, adverse events, and BioThrax reactogenicity events during the trial
• Be able to understand and communicate in English.

Exclusion Criteria:

• Prior immunization with anthrax vaccine or known exposure to anthrax organisms
• Intend to enlist in the military during the study.
• Have a known allergy to aluminum hydroxide, formaldehyde, benzethonium chloride, or latex.
• Plan to receive experimental products 30 days prior to study entry or at any time during the study
• Have received a live vaccine in the 30 days before study entry
• Plan to receive a live vaccine at any time during the study.
• Have ongoing drug abuse/dependence (including alcohol) issues and/or test positive in a urine drug screen for amphetamines, barbiturates, cocaine or opiates
• Have received immunosuppressive therapy (including systemic steroids) within 30 days prior to trial entry
• Have any other condition known to produce or be associated with immunosuppression
• Have received cytotoxic therapy in the previous 5 years
• A chronic condition that, in the opinion of the Investigator, would render vaccination unsafe or would interfere with trial evaluations or completion of the study.