This document discusses how new media can be leveraged for health communication and behavior change. It outlines several theories of health communication and how they can be applied through new media's interactive capabilities. New media allows for immediate, transactional feedback through features like tailored messaging, stage-based interventions, and targeting individual attitudes. While access remains limited, the Internet has potential to reach broad audiences as a mass medium through technologies that deliver content through televisions and familiar settings. Examples of new media resources that can create and implement health campaigns are also provided.