Delayed allergic skin reactions to vaccines.

Recent advances in vaccination against the severe acute respiratory syndrome coronavirus 2 pandemic have brought allergists and dermatologists to the forefront because both immediate and delayed hypersensitivity reactions have been reported. This literature review focused on delayed reactions to vaccines, including possible causative agents and practical information on how to diagnose, evaluate with patch testing, and manage subsequent dose administration. Currently published reviews and case reports in PubMed, along with data on vaccines from the Centers for Disease Control and Prevention web site.

Eosinophil Quantitated Urine Kinetic: A novel assay for assessment of eosinophilic esophagitis.

Background: Eosinophilic esophagitis (EoE) is a chronic disease that requires long-term medical management and monitoring. The eosinophil count determined during esophageal biopsy remains the gold standard for diagnosis and monitoring of EoE. Although markers of eosinophil degranulation correlate with symptoms, eosinophil counts do not correlate.