The prevalence of ILC2s in nasal polyps was high in patients with ECRS.
The prevalence of ILC2s in blood was not different between ECRS and non-ECRS.
The prevalence of ILC2s in blood was high in patients with allergic rhinitis.
The prevalence of ILC2s in blood was low in patients with asthma.
Alternaria-induced IL-33 secretion was increased in nasal epithelial cells of ECRS.