Fig. 1From: Patients with allergic asthma have lower risk of severe COVID-19 outcomes than patients with nonallergic asthmaStudy flow chart. a Cutoff value for positive immunoglobulin E (IgE) test was 0.35 kU/L or greater. b Not mutually exclusive. c Allergic comorbid conditions include allergic rhinitis, acute sinusitis, chronic sinusitis, anaphylaxis, conjunctivitis, dermatitis, food allergy, and urticaria. COVID-19 coronavirus disease 2019Back to article page