Studies on “allergoids” prepared from naturally occurring allergens II. Evaluation of allergenicity and assay of antigenicity of formalinized mixed grass pollen extracts

A crude dialyzed mixed grass pollen extract was modified under mild conditions with formaldehyde in the presence or absence of low molecular weight additives which participate in the chemical reaction. By scratch and intradermal skin testing of grass-sensitive subjects, certain of the derivatives (a...

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