“…In this way, in the face of small stimuli, such as simple catarrhal viruses, hyper-reactivity of the mucous membranes would be triggered, with flowery symptoms, which would end up causing the usual complications and in particular the RARS. Adenoid hypertrophy and adenoiditis contribute significantly to the pathogenesis of RARS, being one of the main differences between the involvement of children and adults [1,53]. The mechanisms by which the intestinal flora modulates the immune response are not clear, but it seems prudent to favor an intestinal microbiota typical of the human species, since evolution and genetic coding have had to configure a specific symbiosis between nutrition, the intestinal microbiota, and immunity that we should not modify.…”