Method and compositions for cutaneous immunisation

1. A method for the epicutaneous vaccination of a mammal against a pathogen, the method comprising:

applying a dry vaccine formulation onto intact skin of the mammal, wherein the skin at the application site has an intact stratum corneum,

wherein the dry vaccine formulation comprises an antigen and is devoid of an adjuvant, and

wherein applying comprises contacting a device to the application site, the device comprising a condensation compartment having a volume ranging between 2 and 100 mm 3 /cm 2 of a surface area of the device and a height between 0.02 and 1 mm, the surface area between 0.2 and 5 cm 2 , said device containing a quantity of the dry vaccine formulation ranging between 0.1 μg and 500 μg per cm 2 of the surface area of the device.

2. The method of claim 1 , wherein the condensation compartment comprises walls formed of a material having a moisture vapor transmission rate that is less than about 10 g/m 2 /24 h.

3. The method of claim 1 , wherein the condensation compartment increases a hydration rate of the skin in the condensation compartment by at least 50% after one hour of application.

4. The method of claim 1 , further comprising adhering the device onto the application site.

5. The method of claim 1 , wherein the dry vaccine formulation is in powder form.

6. The method of claim 1 , wherein the dry vaccine formulation is held on a surface of the device by forces of chemical or physicochemical type, in the absence of adhesive material on this surface.

7. The method of claim 6 , wherein the forces comprise electrostatic forces or Van der Waals forces.

8. The method of claim 1 , wherein the dry vaccine formulation comprises at least one antigen of peptide or polypeptide type, or a polypeptide conjugate with a component of different chemical type.

9. The method of claim 1 , further comprising successively applying to the mammal at least two devices, each application being spaced apart by about 7 to 30 days.

10. The method of claim 9 , comprising maintaining each of the devices in contact with the skin for a period of about 6 to 72 hours.

11. The method of claim 9 , comprising maintaining each of the devices in contact with the skin for a period of about 48 hours, each application being spaced apart by about 15 days.

12. The method of claim 1 , wherein the antigen induces an antibody response of IgG type.

13. The method of claim 1 , wherein the dry vaccine formulation further comprises, or is co-administered with, an immunomodulator compound.

14. The method of claim 1 , wherein the device contains a quantity of dry vaccine formulation ranging between 20 μg and 300 μg per cm 2 of surface.

15. The method of claim 1 , wherein the device contains a quantity of dry vaccine formulation ranging between 20 μg and 100 μg per cm 2 of surface.

16. The method of claim 1 , further comprising successively applying to the mammal at least two devices, each application being spaced apart by about 10 to 20 days.

17. The method of claim 1 , further comprising successively applying to the mammal at least two devices, each application being spaced apart by about 15 days.

18. The method of claim 9 , comprising maintaining each of the devices in contact with the skin for a period of about 6 to 48 hours.

19. The method of claim 9 , comprising maintaining each of the devices in contact with the skin for a period of about 48 hours.

20. The method of claim 13 , wherein the immunomodulator compound is selected from a cytokine and a Toll receptor ligand.

21. The method of claim 1 , wherein the pathogen is selected from a virus, a parasite, a bacterium, a protein, a tumor cell, and a self antigen.