Communication is a process which enables groups and individuals to increase their control over determining health factors acting on people's lifestyles to promote health. Good communication is fundamental to the health sector in a globalized world, since it may influence national and local policies, health promotion campaigns and correct operational practices. Our study analyses four significant incidents related to instances of bad communication and covers questions which have produced rather incoherent results provoking unjustified alarm. It is therefore necessary to prescribe a way of approaching these issues which will firstly lead to a more careful analysis of the risk involved and therefore to make known correct public information. It is necessary to improve the skills of experts in prevention, to promote educational initiatives at school, universities and in workplaces always focussing more on interdisciplinarity and developing new ways of approaching problems concerning health and safety.