A lack of, or deficiency of defenses, makes an organism vulnerable. There is therefore a serious need to study the behaviors of the human immune system, both in terms of health (for preventive purposes) and illness (for curative purposes). The specialist immunologist at Centro Medico Polispecialistico Porta a Terra srl uses specific tests for the analysis of the patient's immune responses. This enables them to identify any other pathologies in progress or any cases of autoimmune diseases, but also the specific allergens affecting a specific individual.