Healthcare is becoming a significant socio-economic challenge around the globe. Aging society is becoming a global trend, adding one more level of socio-economic complexity. Information and Communication Technologies (ICT) to improve healthcare quality and reduce costs for ubiquitous healthcare has been recognized and is being implemented as a national priority in major world economies. The aim of this talk is to present the challenges in this area from the collection of health data from (or in) the "human body", its transmission through the networks to back end cloud infrastructure where it can be stored and processed by doctors and practitioners using advanced eHealth cloud services.