https://www.selleckchem.com/ 001) as well as the intimal VVDmedial VVD ratio (0.67 [0.19-1.08] vs 0.0 [0.0-0.0], P < .001; 0.71 [0.39-1.14] vs 0.0 [0.0-0.0], P < .001) were significantly higher in failed AVFs than in preaccess veins. Moreover, there was a positive relationship between the intimal VVDmedial VVD ratio and the intimal thicknessmedial thickness ratio (P < .001). In addition, the vascular endothelial cell growth factor A expression was higher in failed AVFs than in preaccess veins. Vascularization of the vessel wall was noticeably more developed in the arterialized veins, especially at the NIH regions in failed AVFs. Vascularization of the vessel wall was noticeably more developed in the arterialized veins, especially at the NIH regions in failed AVFs. Hong Kong started its coronavirus disease 2019 (COVID-19) vaccination program in February 2021. A territory-wide Vaccine Allergy Safety (VAS) clinic was set up to assess individuals deemed at "higher risk" of COVID-19 vaccine-associated allergies. A novel "hub-and-spoke" model was piloted to tackle the overwhelming demand of services by allowing nonallergists to conduct assessment. To evaluate the outcomes of the VAS hub-and-spoke model for allergy assessment. Records of patients attending the VAS hub-and-spoke Clinics between March and August 2021 were reviewed (n=2725). We studied the overall results between the Hub (allergist led) and Spoke (nonallergist led) Clinics. The Hub and the Hong Kong West Cluster Spoke Clinic were selected for subgroup analysis as they saw the largest number of patients (n=1411). A total of 2725 patients were assessed under the VAS hub-and-spoke model. Overall, 2324 patients (85.3%) were recommended to proceed with vaccination. Allergists recommended significantly more pas from the study revealed considerable differences in outcomes between allergist-led and nonallergist-led clinics. Precise reasons for these differences warrant further evaluation. We are hopeful that the hub-