We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleClinical trials of Shigella vaccines: two steps forward and one step back on a long, hard road.AuthorsLevine MM; Kotloff KL; Barry EM; Pasetti MF; Sztein MBPublicationNature reviews. Microbiology, 2007, Vol 5, Issue 7, p540ISSN1740-1534Publication typearticleDOI10.1038/nrmicro1662