| 摘要 |
An immune suppressive product prepared by injecting an allergen or a mixture of allergens into the body of milk-produ- cing species. Said product being the milk or a polypeptide subfraction of mi lk obtained from the allergen treated host. The im- mune suppressive product(s) is milk and/or the polypeptide fractions contain ed therein, which is ostensively free of the intact al- lergen or allergens used for the treatment of the host. The immune suppressi ve factors) being a subtraction of the allergen used for the treatment. A method of preparing immune suppressive polypeptides fro m intact allergens, which involves injection of the specific intact allergens into a milk-producing species, collecting the immu ne suppressive polypeptide fractions of the intact al- lergens from the milk of the treated host. The immune suppressive milk containing said polypeptide fractions, and/or the poly- peptide fractions obtained from said milk, are non reactive in animals and humans as allergens. Said factor(s), however, are high- ly effective in preventing or alleviating allergic reactions.
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