No abstract available
Publication types
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Editorial
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Historical Article
MeSH terms
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Aged
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Aged, 80 and over
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Asymptomatic Infections / epidemiology*
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Betacoronavirus / physiology*
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COVID-19
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Coinfection
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Comorbidity
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Coronavirus Infections / diagnosis
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Coronavirus Infections / epidemiology*
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Coronavirus Infections / mortality
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Coronavirus Infections / therapy
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Epidemics / history
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History, 20th Century
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History, 21st Century
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Humans
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Influenza A Virus, H1N1 Subtype / physiology
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Influenza, Human / epidemiology*
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Influenza, Human / mortality
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Influenza, Human / therapy
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Influenza, Human / virology
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Pandemics / history
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Pneumonia, Viral / diagnosis
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Pneumonia, Viral / epidemiology*
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Pneumonia, Viral / mortality
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Pneumonia, Viral / therapy
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SARS-CoV-2
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Severity of Illness Index