Abstract
Inhibitors of influenza virus haemagglutination were completely removed from normal rabbit and ferret sera by purified and concentrated preparations of influenza viruses. Influenza A-prime strains absorbed only the Chu inhibitor and the B/Lee virus the Francis inhibitor. The heat or periodate inactivation of the viruses did not destroy their ability to combine with the inhibitor.The practical application of these experiments in the antibody absorption test for influenza antigenic studies is discussed.
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