 This study will determine if an experimental avian flu bird flu vaccine is safe, whether it has side effects and if it can stimulate an immune response in people. The vaccine being tested in this study is made from DNA genetic material that codes for an influenza protein called hemagglutinin 5 H5, which is based on the protein from the bird flu virus. The study will determine if the body creates resistance or immunity to the H5 protein. The hope is that an immune response to this protein may protect against bird flu virus infection. 