No abstract available
MeSH terms
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Animals
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Birds
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History, 20th Century
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Humans
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Influenza A virus / immunology
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Influenza Pandemic, 1918-1919 / history*
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Influenza in Birds
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Influenza, Human / epidemiology
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Influenza, Human / history*
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Influenza, Human / immunology
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Influenza, Human / mortality
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Pandemics / prevention & control*
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Pneumonia, Bacterial / etiology
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Pneumonia, Bacterial / history
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Pneumonia, Bacterial / mortality
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United States / epidemiology
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Zoonoses / virology