No abstract available
MeSH terms
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Adult
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Aged
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COVID-19 / diagnosis*
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COVID-19 / epidemiology
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COVID-19 Testing / methods*
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Female
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Humans
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Male
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Middle Aged
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Nasal Cavity / virology
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Ontario / epidemiology
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Prospective Studies
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SARS-CoV-2 / isolation & purification*
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Saliva / virology*