No abstract available
MeSH terms
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Allantois
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Animals
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Biological Assay
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Cell Fusion
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Cells, Cultured
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Chick Embryo
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Chorion
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Extraembryonic Membranes*
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Hemagglutination Inhibition Tests
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Hemagglutination, Viral
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Hemolysis
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Immune Sera
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In Vitro Techniques
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Neuraminidase / metabolism
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Neutralization Tests
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Parainfluenza Virus 1, Human* / enzymology
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Virus Cultivation* / methods
Substances
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Immune Sera
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Neuraminidase