BACKGROUND/OBJECTIVESAllergic rhinitis is a common global disease.Changes in gut microbiota due to antibiotic overuse and modern diets may contribute to rising allergic diseases.Probiotics can regulate gut flora and immune responses.This study aimed to evaluate the effects of probiotic nasal sprays on immune responses and clinical outcomes in persistent allergic rhinitis.
Tafrishi et al. (Sun,) studied this question.