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The use of adjuvants to enhance the immune response to novel pandemic influenza vaccine candidates may overcome the poor immune responses seen in immunologically naïve populations. The confluence of a highly pathogenic H5N1 influenza virus and the widespread absence of pre-existing immunity has driven the search for effective strategies for immunization in the face of a lethal pandemic. The potent...
Enterotoxigenic Escherichia coli (ETEC) is a major cause of travellers' diarrhoea. We investigated the rate of diarrhoea attacks, safety, and feasibility of a vaccine containing heat-labile enterotoxin (LT) from ETEC delivered to the skin by patch in travellers to Mexico and Guatemala. In this phase II study, healthy adults (aged 18–64 years) who planned to travel to Mexico or Guatemala and had...
A Skin Prep System (SPS) has been developed to provide a well-tolerated and controlled method of stratum corneum disruption using mild abrasion as part of transcutaneous immunization (TCI). In this study, four groups (n=10) of volunteers were pretreated with the SPS using three different lengths of mild abrasive strips (13mm, 25mm and 38mm), or a handheld applicator. They then received a vaccine patch...
An enterotoxigenic Escherichia coli (ETEC) vaccine could reduce diarrhea among children in developing countries and travelers to these countries. The heat-labile toxin (LT) of ETEC is immunogenic but too toxic for oral or nasal vaccines.In a double-blind, placebo-controlled trial, 59 adults were randomized to receive 50μg of LT or placebo in a patch applied to alternating arms on days 0, 21, and 42...
The elderly have greater morbidity and mortality due to influenza, and respond poorly to influenza vaccination compared to younger adults. This study was designed to determine if the adjuvant heat-labile enterotoxin from Escherichia coli (LT), administered as an immunostimulant (IS) patch on the skin with influenza vaccination, improves influenza immune responses in the elderly. Three weeks following...
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