464 Specific Venom Ige Decrease during 5 Years of Venom Immunotherapy (VIT): Clinical Relevance in Stung and Not Stung Patients.

Background As the question of how long VIT should last in order to provide long-term protection is a long-standing issue, we evaluated the specific venom IgE decrease throughout 5-years-long VIT in 3 groups of yellow jacket (YJ) venom-allergic patients: stung during the first 3 years of VIT (SP3), during the last 2 years (SP5) and patients not stung (NS).