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Diphtheria Immunisation

Volume 462: debated on Tuesday 1 March 1949

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asked the Minister of Health what is the composition of the preparation now being injected into children for immunisation against diphtheria; and whether an assurance can be given that the inoculation will not, in any case, be followed by a reaction.

Different preparations are in use, but the basis of them all is diphtheria toxin treated with formalin and heat. I am advised that the possibility of reactions cannot entirely be ruled out, but they are very rare.