There are two purposes for conducting this Vaccine Study to evaluate an experimental vaccine called CVD 1208S (Center for Vaccine Development 1208S): 1) to learn whether CVD 1208S causes side effects, and 2) to learn whether the CVD 1208S gives people immunity to Shigella.
The purpose of this study is to determine whether CVD 1208S (a live, attenuated, oral vaccine) is safe and effective in the prevention of Shigella infection.