§ 55. Mr. Remnantasked the Minister of Health how far it is essential for its efficiency that Salk Vaccine should be kept within a 3° and 7° centigrade range of temperatures until one hour of its use; and to what extent the same applies to the British vaccine.
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§ Mr. Walker-SmithI am advised that both British and Salk poliomyelitis vaccines should be stored at a temperature of between 2° and 10° centigrade and that while limited exposure to higher temperatures is not harmful, temperatures over 20° C should be avoided, as also should freezing. These conditions should be maintained to eliminate any risk of loss of potency.