An introduction: social media and the transitioning roles and relationships in health care -- Software applications supporting social media -- Selecting devices and related hardware to support social media -- Applications and tools promoting health 2.0 via social media -- Consumer-centered virtual health communities -- Personal health records (PHRs) -- Telehealth -- Business models and health-related social media -- Professional guidelines, policies, regulations, and laws impacting health-related social media communication -- Social media and health care-tomorrow and beyond.