The right to health is a fundamental right whose recovery depends on healthcare providers by providing the required devices and medical equipment, and the states, the circumstances under which you can find health service users. Thus, beyond medical conditions, patients may find themselves vulnerable in certain circumstances, affecting the quality or conduct the medical act. In this sense, it can be considered as having issues: the lack of health education, lack of rights and obligations in the field, consenting to medical experiments for which the patient is not fully informed or whose meaning he/she fails to understand, poor material possibilities, the time factor. A state of vulnerability may exist in the health care providers, while vulnerabilities over possible violations of ethics rules may result even in liability. Prevention or removal of these conditions of vulnerability is likely to contribute to an increased quality of medical care.