No abstract available
MeSH terms
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Antigenic Variation*
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Antigens, Viral / genetics*
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Disease Outbreaks
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Genetic Drift
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Humans
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Influenza A virus / genetics*
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Influenza A virus / immunology
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Influenza B virus / genetics*
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Influenza B virus / immunology
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Influenza Vaccines / immunology*
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Influenza, Human / epidemiology
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Influenza, Human / immunology*
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Influenza, Human / virology
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Mutation
Substances
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Antigens, Viral
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Influenza Vaccines