This module is about the parasites and pathogens that normally infect animals and which cause disease in people and livestock. The module will consider the different types of parasites and pathogens; how, when, and where they infect hosts; the evolution (and co-evolution) of parasites and hosts, and host responses and adaptation to infection. The module is taught through lectures and workshops, giving students the opportunity to discuss concepts and practice problem solving. The assessment consists of producing an academic poster on an example pathogen and an exam.