In my opinion, initially eHealth may comes from electronic health because it is the emerging field that health services and information technology, via electronic devices, are intersection.
Nowadays the definition of ehealth is much more boarden, basically , eHealth is still the way to incooperate into health care to promote health and well being. However it is involved in various form of technology
– for patient it involved in forms of wearable machine or self monitoring devices (eg. bloode pressure monitoring, blood glucose monitoring) to collect the data and send to the doctor for diagnosis or treatment plan
– For physician it involved in forms of electronic medical record, remote robotic surgery, realtime long distance consultation such as telehealth between physicians or between patient and physician, diagnostic decision support system etc.
– For pharmacist, paramedics , and public health it involved in forms of electronics medical record, electronics prescription, robotics dispensary systems, disease surveillence projects and also health data resources