LT Vaccine Patch Self-Administration Study

Inclusion Criteria: Subjects must meet all of the following inclusion criteria to be eligible to participate in the study: * Healthy adult males or females 18-64 years of age with signed Informed Consent. * Women who are not post-menopausal or surgically sterile must have a negative serum or urine pregnancy test at screening and within 24 hours of each vaccination with understanding (through Informed Consent process) to not become pregnant over the duration of the study, and must agree to employ an effective form of birth control for the duration of the study. Acceptable forms of birth control are: abstinence, hormonal contraceptives (oral, injectable, implant, patch, ring), double-barrier contraceptives (condom or diaphragm, with spermicide), and IUD. Exclusion Criteria: Subjects meeting any of the following criteria are not eligible for participation in the study: * Laboratory abnormalities \[as determined by the Toxicity Grading Scale (grade 1-4)\] at laboratory screening * Abnormalities at physical examination \[as determined by the Toxicity Grading Scale (grade 1-4)\] * Known allergies to any component of the vaccine * Known allergies to adhesives * Participated in research involving investigational product within 30 days before planned date of first vaccination * Donated blood or blood products such as plasma within the past 30 days * Ever received investigational enterotoxigenic E. coli, LT, or LT (R192G) or NasalFlu, Berna Biotech, Ltd * Ever received cholera tox…