This document discusses using virtual worlds to train medical professionals through interactive simulations and collaborations. Key points include: - Medical professionals can be trained in virtual worlds through hospital simulations that promote decision making skills and lessons with interactive 3D objects. - Support groups for various medical conditions exist in virtual worlds to provide peer support. - Collaboration between subject matter experts and content developers is important to create effective medical training in virtual worlds. Examples of collaborations are provided. - Funding collaborative virtual world training and addressing legal/infrastructure challenges are discussed.