Learned and professional societies as well as health authorities must attempt to provide free access to their databases for physicians, by a simple repertory of key words and, if necessary, by portals. Although information available for physicians may not be intended to be secret, it often requires some professional training to be interpreted appropriately. The principles of the Code of Medical Ethics, as transcribed in the Public Health Code, apply to all forms and media of information and communication. In public spaces, readers must be guaranteed that information written by physicians corresponds to the state of the art, that it is not advertising or self-promotion or commercial, that it was developed by a process ensuring quality, and that it distinguishes clearly between a popularized description of scientific data and what remains uncertain because research is on-going. The public should be informed about the source of the information they see, the editorial quality of the site, and any potential financial dependence or conflicts of interest. According to the medical association, prudence is recommended for physicians who moderate chat-rooms and discussion lists. List moderation, like any other type of medical activity, must not be improvised; it requires prudence, thought, and training.