This is Part 1 of an updated follow-up review of a World Allergy Organization (WAO) position paper published in 2012 on the diagnosis and treatment of urticaria and angioedema. Since 2012. there have been advances in the understanding of the pathogenesis of chronic urticaria. and greater experience with the use of biologics. https://www.allfixelectricales.shop/product-category/electric-jug-element/