Vis-invis and VisionOn form two consecutive projects. Vis-invis engaged in research leading to the development of dynamic visualisation approaches of use in the prevention and control of healthcare associated infections (HAIs). A set of three concept prototype visualisations was produced and evaluated, and were seen as ready for further development and application. VisionOn takes this initial work forward through a knowledge exchange project by developing a tablet-based training tool for healthcare staff using digital visualisations of data on pathogens: how they behave in the ward context and how to prevent their spread. Co-design methods are used to develop and evaluate the visualisations, developed from quantitative data on pathogens, through inputs from key hospital staff stakeholder groups – from two NHS Scotland regions doctors, nurses and cleaning staff, with support from GAMA Healthcare Ltd.