IL1A and COVID-19: Since it has been reported that myriad cytokines were raised in the blood of COVID‐19 patients (Mangalmurti & Hunter, 2020), we examined the ones that could potentially affect permeability, including IL‐1α, IL‐1β, TNF‐α, IFN‐γ, and VEGF, in the cases with or without GI symptoms.