Digital health, Aerts explained, encompasses all concepts and activities at the intersection of health and information and communication technology (ICT), including mobile health (mHealth), health information technology (IT), health information systems, wearable devices, telehealth, and telemedicine. The three main areas of digital health include the delivery of health information to health professionals and health consumers through the Internet and telecommunications; using ICTs to improve public health services, such as through education and training of health workers; and using health information systems to capture, store, manage, or transmit information on patient health or health facility activities.