No abstract available
Publication types
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Letter
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Research Support, Non-U.S. Gov't
MeSH terms
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Adult
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Aged
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Aged, 80 and over
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Diagnosis, Differential
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Female
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Humans
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Immunoglobulin A / blood*
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Influenza, Human / complications
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Influenza, Human / diagnosis*
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Influenza, Human / immunology*
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Male
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Middle Aged
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Plasma / chemistry
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Pneumonia, Viral / diagnosis*
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Pneumonia, Viral / immunology*