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Chronic spontaneous urticaria (CSU) is a condition defined by the presence of recurrent urticaria, angioedema, or both, which persist for more than six weeks in duration and occurs in the absence of an identifiable trigger. Both children and adults can develop CSU, although it is more common in adults and in women than in men, with a peak occurrence in the third to fifth decades of life. It imposes a significant burden on patients, families and healthcare systems. The goal of therapy in patients with CSU is to achieve a level of symptom control and improvement in quality of life that is acceptable to the patient, while minimizing therapy-related side effects. The recent introduction of biologic drugs has changed the management of the disease. This work aims to provide a narrative review of the current state of biological therapy and the promising drugs under development for CSU.

The management of chronic diseases are paramount in health care in these days. Among them, there has been an expansion of allergic and immunologic diseases, especially in children. Thanks to the action of the Italian Society of Pediatric Allergy and Immunology (SIAIP), the quality level of care has progressively grown. SIAIP developed a task force with the purpose of proposing updated models  for  assessing,  and  prescribing  treatment in the allergy and immunology field that have been issued in this supplement. In a very difficult time for everyone, current developments covering a broad range of topics in the field are presented. All Authors have to be thanked, since they have participated with passion and have taken valuable time away from their professional and private interests. We hope that the readership will enjoy these papers.

Histaminergic urticaria-angiodema is a common complaint in children. According to clinical criteria, it is classified as acute and chronic urticaria. A further clinical classification relies on triggering factors. We focus on diagnosis and therapeutic strategies. We report the main progresses in the field and issues that remain to be understood.