Phase II Tularemia Vaccine Comparison

The purpose of this study is to compare 2 experimental vaccines that could provide protection from the disease, tularemia. This research will compare the ability of the vaccines to cause the body to develop an immune (protective) response and obtain more information on side effects of the vaccines. About 220 male and non-pregnant female volunteers 18 to 45 years will participate. Volunteers will be assigned to 1 of 2 vaccine groups by chance. About half of the volunteers will be placed in the DVC-LVS vaccine group and half of volunteers will be placed in the USAMRIID-LVS vaccine group. Additionally, both groups will receive an injection of placebo (inactive salt water). Study procedures include physical exam and blood and urine samples. Evaluation of the vaccination sites will be performed as well as blood samples to measure the body's response to the vaccine. Participants will be involved in the study for about 6 months.