Method for keeping an immunogenic composition available for administration to an animal
The present invention pertains to a method for keeping an immunogenic composition available for administration to an animal, wherein said composition comprises an antigen and an emulsion which is a single emulsion at a first temperature below a body temperature of the animal and which emulsion reverses at a second temperature between the first temperature and the body temperature, said method comprising providing the composition, freezing the composition, and storing the frozen composition until it is needed for administration to the animal. The invention also pertains to a method for testing an immunogenic composition, and an immunogenic composition, optionally in combination with specific instructions for storing the composition.
1. A method for keeping a killed foot-and-mouth disease vaccine available for emergency vaccination of animals against foot-and-mouth disease, the vaccine comprising a foot-and-mouth disease antigen formulated in a water-in-oil emulsion, said method comprising: providing the formulated vaccine, freezing the vaccine, and storing the frozen vaccine until it is needed for emergency vaccination; wherein the vaccine is frozen by using a non-snap-freezing process; and wherein the method has no or hardly any negative influence on the potency of the vaccine.
2. The method of claim 1 , wherein a potency of the vaccine is established before it is stored.
3. The method of claim 1 , wherein prior to the step of freezing the vaccine, the vaccine is supplied to a party.
4. The method of claim 1 , wherein the vaccine is supplied to a party after it has been frozen.
5. The method of claim 1 , wherein the vaccine is frozen in a compressor type freezer.
6. The method of claim 1 , wherein the freezing process takes place at around −20° C.
7. The method of claim 1 , wherein the water-in-oil emulsion is based on mineral oil.
8. A method for testing a killed foot-and-mouth disease vaccine comprising a foot-and-mouth disease antigen formulated in a water-in-oil emulsion, said method comprising: formulating the vaccine, freezing the vaccine, storing the frozen vaccine for a predetermined time, thawing the vaccine, and determining the potency of the thawed vaccine; wherein the vaccine is frozen by using a non-snap-freezing process.
9. The method of claim 6 , wherein the water-in-oil emulsion is based on mineral oil.