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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Age Factors
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Aged
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Aged, 80 and over
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Finland
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Hospitalization
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Humans
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Respiratory Tract Infections / diagnosis*
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Respiratory Tract Infections / virology*
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Virus Diseases / diagnosis*
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Virus Diseases / virology