Freeze-Dried MVA-BN® Lot Consistency Smallpox Trial

This is a Phase 3 multicenter trial to evaluate safety and immune response of three consecutive production lots of freeze-dried (FD) MVA-BN smallpox vaccine. The vaccine will be given to healthy subjects who do not have a smallpox scar.

Approximately 1110 subjects will be randomly enrolled into one of three groups:

Group 1 will include 370 subjects, who will receive two separate injections (shot) with a short needle, given below the skin of the upper arm with 0.5 mL FD MVA-BN (Lot 1).

Group 2 will include 370 subjects, who will receive two separate injections (shot) with a short needle, given below the skin of the upper arm with 0.5 mL FD MVA-BN (Lot 2).

Group 3 will include 370 subjects, who will receive two separate injections (shot) with a short needle, given below the skin of the upper arm with 0.5 mL FD MVA-BN (Lot 3).

The primary objective of the trial is to show that the immune response elicited (produced) by three consecutively produced MVA-BN lots are statistically (numerically) comparable.


Eligibility Criteria:
Inclusion Criteria:

* The subject has read, signed and dated the ICF
* Body Mass Index ≥ 18.5 and \< 35
* Women of childbearing potential (WOCBP) must have used an acceptable method of contraception for 30 days prior to the first vaccination, must agree to use an acceptable method of contraception during the trial, and must avoid becoming pregnant for at least 28 days after the last vaccination. A woman is considered of childbearing potential unless post-menopausal (defined as ≥ 12 months without a menstrual period) or surgically sterilized. Acceptable contraception methods are restricted to abstinence, barrier contraceptives, intrauterine contraceptive devices or licensed hormonal products).
* WOCBP must have a negative serum pregnancy test at screening (please note: a negative urine pregnancy test is required within 24 hours prior to each vaccination)
* White blood cells ≥ 2500/mm3 \< ULN (Upper Limit of Normal)
* Absolute neutrophil count (ANC) within normal limits
* Hemoglobin within normal limits
* Platelets within normal limits
* Adequate renal function defined as a calculated Creatinine Clearance (CrCl) \> 60 mL/min as estimated by the Cockcroft-Gault equation: (140 - age in years) x (body weight in kg) ÷ (serum creatinine in mg/dL x 72) = CrCl (mL/min). For women the result, calculated with the above formula, has to be multiplied by 0.85 = CrCl (mL/min)
* Adequate hepatic function defined as: Total bilirubin ≤ 1.5 x ULN in the absence of other evidence of significant liver disease Aspartate aminotransferase (AST), alanine aminotransferase (ALT) and alkaline phosphatase ≤ 1.5 x ULN
* Electrocardiogram (ECG) without clinically significant findings (e.g. any kind of atrioventricular or intraventricular conditions or blocks such as complete left or right bundle branch block, AV node block, QTc or PR prolongation, premature atrial contractions or other atrial arrhythmia, sustained ventricular arrhythmia, two premature ventricular contractions in a row, ST elevation consistent with ischemia).

Exclusion Criteria:

* Typical vaccinia scar
* Known or suspected history of smallpox vaccination
* History of vaccination with any poxvirus-based vaccine
* US Military service prior to 1991 or after January 2003
* Pregnant or breast-feeding women
* Uncontrolled serious infection, i.e. not responding to antimicrobial therapy
* History of any serious medical condition, which in the opinion of the investigator would compromise the safety of the subject or would limit the subject's ability to complete the trial
* History of or active autoimmune disease, persons with vitiligo or thyroid disease taking thyroid replacement are not excluded
* Known or suspected impairment of immunologic function including, but not limited to, human immunodeficiency virus (HIV) Infection, clinically significant liver disease (including chronic active Hepatitis B Virus (HBV) or Hepatitis C Virus (HCV) infection), diabetes mellitus
* History of malignancy other than squamous cell or basal cell skin cancer, unless there has been surgical excision that is considered to have achieved cure. Subjects with history of skin cancer must not be vaccinated at the previous tumor site.
* History or clinical manifestation of clinically significant and severe hematological, pulmonary, central nervous, cardiovascular or gastrointestinal disorders
* Clinically significant mental disorder not adequately controlled by medical treatment
* History of coronary heart disease, myocardial infarction, angina pectoris, congestive heart failure, cardiomyopathy, stroke or transient ischemic attack, uncontrolled high blood pressure, or any other heart condition under the care of a doctor
* Abnormal Troponin I level \> ULN
* Known history of an immediate family member (father, mother, brother, or sister) who has had onset of ischemic heart disease before age 50 years
* Active or history of chronic alcohol abuse and/or intravenous and/or nasal drug abuse (within the past 6 months)
* Known allergy to MVA-BN vaccine or any of its constituents, e.g. tris (hydroxymethyl)-amino methane, including known allergy to egg or aminoglycosides
* History of anaphylaxis or severe allergic reaction to any vaccine
* Acute disease (illness with or without a fever) at the time enrollment
* Body temperature ≥ 100.4°F (≥ 38.0°C) at the time of enrollment
* Having received any vaccinations or planned vaccinations with a live vaccine within 30 days prior to or after trial vaccination
* Having received any vaccinations or planned vaccinations with a killed/inactivated vaccine within 14 days prior to or after trial vaccination
* Chronic systemic administration (defined as more than 14 days) of \> 5 mg prednisone (or equivalent)/day or any other immune-modifying drugs during a period starting from three months prior to administration of the vaccine and ending at last physical trial visit (Visit 5)
* Post organ transplant subjects whether or not receiving chronic immunosuppressive therapy
* Administration or planned administration of immunoglobulins and/or any blood products during a period starting from three months prior to administration of the vaccine and ending at last physical trial visit (Visit 5)
* Use of any investigational or non-registered product within 30 days preceding the first dose of the trial vaccine, or planned administration of such a drug during the trial period
* Trial personnel