In the "infodemic" and "big data" age, access to diverse data has increased enormously, opening up new possibilities for surveillance. At the same time, Switzerland is struggling to define what is needed for a reliable and efficient health information system. How should we assess cancer burden or environmental risks? How do we monitor the quality of health care? What surveillance tools do we need and want? And what about governance? Public health surveillance lies at the interface between applied public health, population-based health sciences, and epidemiology, and therefore concerns all actors who want to protect and promote the health of the Swiss population. Read more.