Pandemic Influenza Plasmid DNA Vaccines (Needle-Free)

Inclusion Criteria: * 18 to 45 years of age * Able to provide informed consent and be followed for 6 months Exclusion Criteria: * No immunomodulatory therapy within the past 6 months * No evidence of immunodeficiency or pregnancy * No laboratory or evidence of clinically significant medical disease * No history of previous pDNA immunization * No influenza immunization within the past 30 days * No blood donations within 30 days of screening visit * No history of bleeding disorder * No use of aspirin and/or anticoagulants within 2 weeks of the administration of the investigational vaccines