Publication Date December 3, 2020 Risk communication and community engagement (RCCE) are critical to building trust and arresting the spread of rumors. Uncertainty around the novel coronavirus SARS-CoV- has led to the propagation of unverified pieces of information that spread rapidly - either by people sharing them in good faith (misinformation) or by those who intend to harm others (disinformation). Real-time rumour tracking (RT2) is the process of systematically collecting, analysing, visualising, and addressing such rumours in real time. This guide provides an overview of the role of rumours in a public health or humanitarian emergency and describes the community-based RT2 approach taken by the United States Agency for International Development (USAID)-funded Breakthrough ACTION project during the COVID-19 pandemic.