1. Application: a) at least two different microorganisms； or b) at least one microorganism and at least one non-digestible oligosaccharide； or c) at least two different types of Bifidobacteria, subspecies or strains for the manufacture of a composition for enteral administration to a baby born by caesarean section. 2. The use of claim 1, wherein the composition comprises at least one species of Bifidobacteria. The use according to claim 1, wherein the composition comprises at least one species of Bifidobacterium, selected from the group consisting of Bifidobacterium breve, Bifidobacterium infantis, Bifidobacterium bifidum, Bifidobacterium bifidum bifidum bifidum bifidifactum bifidobacterium bifidobacterium bifidobacterium bifidobacterium bifidobiferium bumidifactum, , Bifidobacterium pseudocatenulatum, Bifidobacterium thermacidophilum, and Bifidobacterium longum. 4. The use according to claim 1, wherein the composition comprises at least two species of Bifidobacterium, selected from the group consisting of Bifidobacterium breve, Bifidobacterium infantis, Bifidobacterium bifidum, Bifidobacterium bifidum bifidum bifidifum bifidium bacterium bifidobacterium bifidobacterium bifidobacterium bifidobacterium bifidobacterium bifidobacterium bifidobacterium bumidum , Bifidobacterium pseudocatenulatum, Bifidobacterium thermacidophilum and Bifidobacterium longum. 5. The use of claim 1, wherein the composition comprises at least one microorganism and at least one non-digestible oligosaccharide. The use according to claim 5, wherein the non-digestible oligosaccharide is selected from the group consisting of galactooligosaccharides, non-digestible dextrins, xylo-oligosaccharides, arabino-oligosaccharides, gluco-oligosaccharides, mannooligosaccharides, and isomalt-oligosaccharides and fructo. The use of claim 3, wherein the composition comprises at least one microorganism and at least one non-digestible oligosaccharide. The use of claim 7, wherein the non-digestible oligosaccharid
