The concept of electronic health (eHealth) literacy evolved from the social and information sciences and describes competencies necessary to use electronic health services. As it is a rather new topic, and as there is no current overview of the state of the art in research, it is not possible to identify research gaps. Therefore, the objective of this viewpoint article is to increase knowledge on the current state of the art of research in eHealth literacy and to identify gaps in scientific research which should be focused on by the research community in the future. The article provides a current viewpoint of the concept of eHealth literacy and related research. Gaps can be found in terms of a missing "gold standard" regarding both the definition and the measurement of eHealth literacy. Furthermore, there is a need for identifying the implications on eHealth developers, which evolve from the measurement of eHealth literacy in eHealth users. Finally, a stronger inclusion of health professionals, both in the evolving concept and in the measurement of eHealth literacy, is needed in the future.

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Purpose Deconstructing current definitions of “health literacy (HL)” and “eHealth literacy (eHL)”, into the core notion of “understanding health information (HI)”, this study provides insights into what promotes and inhibits the understanding of HI for breast cancer patients during cancer patient pathways (CCP) in Norway. Methods Seven well-educated women were interviewed. Through a stepwise deductive-inductive analysis of the transcribed interviews, the following topics were identified: 1) explanations accompanied by drawings, 2) individualized knowledge-based information, 3) information processing capacity, and 4) ambiguity in medical information. Results The women's understanding of HI increased when spoken communication was accompanied by visual illustrations, which served as roadmaps throughout the CPP. Even if HI should be targeted to the patients’ individual needs, some HI can be generalized if it refers to established knowledge about the health phenomena. The women described their changing mental and physical status during the CPP and how these changes influenced their understanding of HI. Conclusion The results challenge the idea that HL and eHL are fixed, stable, personal characteristics. On the contrary, HL/eHL, in this case particularly the understanding of HI, depends on the individual (temporary) physical and cognitive capacity of the patient and adaptation in the institutional and private contexts.