eHealth (also written e-health) is a relatively recent term for healthcare practice which is supported by electronic processes and communication, some people would argue the term is interchangeable with Health Informatics.
The most commonly cited definition is the one by Gunther Eysenbach, published in the article What is e-health? J Med Internet Res 2001;3(2):e20:
- e-health is an emerging field in the intersection of medical informatics, public health and business, referring to health services and information delivered or enhanced through the Internet and related technologies. In a broader sense, the term characterizes not only a technical development, but also a state-of-mind, a way of thinking, an attitude, and a commitment for networked, global thinking, to improve health care locally, regionally, and worldwide by using information and communication technology.
An article by Oh H, Rizo C, Enkin M, Jadad A. What Is eHealth (3): A Systematic Review of Published Definitions in the J Med Internet Res 2005;7(1):e1 article attempted to examine all existing literature on the subject.