Helping people understand the potential benefits and harms to their health from different actions and treatments they might take, and the evidence behind it, is a difficult task. During a public health emergency it becomes even harder. The Winton Centre in the UK and the Harding Center in Germany are two sister centres that work on how best to communicate these sorts of risks - from helping someone understand their risk from COVID-19 to communicating the potential benefits and harms of a vaccine. In this webinar the two centres will present some of the empirical work that they have done, testing different kinds of communication on these topics, and there will be a chance to discuss the implications for practice and areas that need further research.