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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Antibodies, Viral / blood*
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Antibodies, Viral / immunology
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Betacoronavirus / immunology*
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COVID-19
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China / epidemiology
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Cohort Studies
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Coronavirus Infections / blood*
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Coronavirus Infections / epidemiology
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Coronavirus Infections / immunology
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Hospitalization
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Humans
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Immunoglobulin G / blood*
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Immunoglobulin G / immunology
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Immunoglobulin M / blood*
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Immunoglobulin M / immunology
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Middle Aged
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Pandemics
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Pneumonia, Viral / blood*
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Pneumonia, Viral / epidemiology
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Pneumonia, Viral / immunology
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SARS-CoV-2
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Visitors to Patients
Substances
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Antibodies, Viral
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Immunoglobulin G
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Immunoglobulin M