Research Explainer (VIDEO) University of Liverpool This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Professor Melita Gordon explains the background and findings of the study 'Nonspecific effects of oral vaccination with live-attenuated Salmonella Typhi strain Ty21a.' Credit Professor Melita Gordon Usage Restrictions credit attributed License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.