Evaluation of the Clinical Efficacy of Antrrix Probiotics in Improving Recurrent Respiratory Infections in Infants and Young Children

This study is an 8-weeks, randomized controlled trial involving children under 6 years of age who meet clinical diagnostic criteria for RRTI. Participants are randomized to receive either probiotic or placebo. The primary clinical outcomes assessed are duration and frequency of respiratory symptoms and quality of life. To investigate potential mechanisms, stool samples were collected pre- and post-intervention for 16S rRNA gene sequencing to analyze changes in gut microbiota composition and identify specific bacterial taxa associated with clinical improvements.