The use of e-health technologies, including mobile health, is spreading rapidly in low- and medium-income countries around the world, according to a new report from the World Health Organization (WHO). In part, this is because the use of mobile phones and computers is growing in these developing nations, the report said. But less than a quarter of the surveyed health programs used e-health technologies, and their reliance on private donors -- which provided nearly half of their financing -- is one factor limiting their expansion, the WHO report said.