CCL2 and allergic disease: In a prospective study during and after anaphylaxis caused by Hymenoptera venom, medication, food, or other (idiopathic), we investigated the serum concentration of a large panel of different chemokines (CCL2, CCL5, CCL7, CCL8, CCL11, CCL13, CCL17, CCL21, CCL22, CCL24, and CCL26), which were previously described in allergic diseases [6, 7, 15–25].