The eHealth technology will bring many benefits for patients, healthcare professionals, and institutions, especially in developing countries, such as Brazil. The eHealth solutions will enable faster, safer, and better healthcare services through the integration of Information and Communication Technologies (ICTs) with eHealth issue. This paper gives an overview of the Context-Aware Mobile Approach (CAMA) on going research activities for eHealth environments. CAMA seeks to improve the Brazilian primary healthcare system through context-aware eHealth facilities, expecting to change the way that healthcare services are applied, managed, and maintained to achieve efficiency, safety, and reliability for both patients and hospital staffs.