Professor Paul Digard is Chair of Livestock Immunology in the University's Roslin Institute.

Recorded on Tuesday 6 November 2012 at the University of Edinburgh's Appleton Tower lecture theatre.

This lecture is part of the University's "Our Changing World" public lecture series, which examines the global challenges facing society, and the role of academia in meeting these challenges: http://www.ed.ac.uk/events/changing-world