1. A topical composition containing, as an active ingredient, a combination of glycerin, petroleum jelly and petrolatum in the form of an oil-in-water or water-in-oil emulsion for use in preventing atopic dermatitis. ! 2. The composition according to claim 1, where the petroleum jelly has a dropping point of from 35 to 70 ° C. ! 3. The composition according to claim 2, where the petroleum jelly has a dropping point of 51 to 57 ° C, in particular 54 ° C. ! 4. The composition according to claim 2, where the petroleum jelly has a consistency of 175 to 195 1/10 mm (cone penetration at 25 ° C). ! 5. The composition according to claim 4, where the petroleum jelly has a consistency of approximately 185 1/10 mm (conical penetration at 25 ° C). ! 6. The composition according to claim 4, where the petroleum jelly has a viscosity of 4 to 5 cSt at 100 ° C. ! 7. The composition according to claim 6, where the petroleum jelly has a viscosity of about 4.8 cSt at 100 ° C. ! 8. The composition according to claim 2, where the petroleum jelly has a viscosity of 4 to 5 cSt at 100 ° C. ! 9. The composition of claim 8, where the petrolatum has a viscosity of about 4.8 cSt at 100 ° C. ! 10. The composition according to claim 1, where the petroleum jelly has a consistency of 175 to 195 1/10 mm (cone penetration at 25 ° C). ! 11. The composition of claim 10, where the petrolatum has a consistency of approximately 185 1/10 mm (conical penetration at 25 ° C). ! 12. The composition of claim 10, where the petroleum jelly has a viscosity of 4 to 5 cSt at 100 ° C. ! 13. The composition according to item 12, where the petroleum jelly has a viscosity of about 4.8 cSt at 100 ° C. ! 14. The composition according to claim 1, where the petroleum jelly has a viscosity of 4 to 5 cSt at 100 ° C. ! 15. The composition of claim 14, wherein the petrolatum has a viscosity of about 4.8 cSt at 100 ° C. ! 16. The composition according to any one of claims 1 to 15 for its use in the primary prevention of atopic d
