Abstract: Systems, methods, and computer-readable media for simulating the course of an event or for collecting data for the simulation are provided. A processing unit can receive attributes of synthetic populations and corresponding forecasts of progress of an event, e.g., an epidemic. The processing unit can determine a disease model based on the forecasts and historical data of the event. The disease model can be associated with at least one attribute of each of the synthetic populations. The processing unit can determine a forecast of the progress of the event based on the received forecasts and weights associated with user accounts. In some examples, the processing unit can receive the attributes, present via a user interface a plurality of candidate forecasts of an epidemic, and receive via the user interface a forecast, e.g., rankings or data, of the epidemic with respect to the synthetic population indicated by the attributes.