No detection of Levels for Nicotine or Cotinine (also nicotine), suggesting no recent nicotine exposure (100% Negative) Cut-off Levels: While cut-offs may vary by laboratory, some common ones are that a result is considered "positive" above 10 ng/mL for cotinine, suggesting the person has smoked within the past few days
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Additionally, data mining and in silico studies for evaluating the effects of smoking/nicotine on COVID-19 patients were performed

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