No abstract available
Publication types
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Letter
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Observational Study
MeSH terms
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Animals
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BCG Vaccine / immunology*
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Betacoronavirus / immunology*
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COVID-19
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Coronavirus Infections / epidemiology*
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Coronavirus Infections / immunology
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Coronavirus Infections / mortality*
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Coronavirus Infections / virology
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Humans
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Hygiene Hypothesis
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Immunization Schedule
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Mycobacterium tuberculosis / immunology
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Pandemics
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Pneumonia, Viral / epidemiology*
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Pneumonia, Viral / immunology
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Pneumonia, Viral / mortality*
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Pneumonia, Viral / virology
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SARS-CoV-2
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Vaccination*