FUT2 and inflammatory bowel disease: In the previous discussion, the alteration of intestinal flora has been considered to be an important cause or consequence of intestinal diseases, and there are hypotheses suggesting that its function and attachment can be differentially influenced by FUT2, which has received great attention in the previous studies on IBD, and at the same time, some genera are also associated with viral infections, so it should also receive more attention in the studies about NoV, especially the pathogenic mechanism.