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.本發明關於將致免疫組成物維持可供投與動物的方法,其中該組成物包含抗原及乳劑,該乳劑在低於該動物體溫之第一溫度下為單乳劑且該乳劑在介於該第一溫度和該體溫間之第二溫度下反轉,該方法包含提供該組成物、將該組成物冷凍並將經冷凍之組成物貯存直至需將其投與動物。本發明亦關於用於測試致免疫組成物之方法及可選擇地與用於貯存該組成物之特定用法說明組合的致免疫組成物。
