Since the term eHealth is widely used, it is useful to define it also and it's relationship to health informatics.

Unfortunately, the term eHealth has many informal meanings so it is difficult to define clearly and can lead to confusion.

eHealth has been applied to: telemedicine, patient centered health records and information access, health data collections, research using electronic records, and many other areas.

We prefer to use the more precise term health informatics to define the collection, manipulation, and use of health information.