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Smoking is associated with worse outcomes of COVID-19 particularly among younger adults: A systematic review and meta-analysis

2020-09-23 public and global health Title + abstract only
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Background: Smoking impairs lung immune functions and damages upper airways, increasing risks of contracting and severity of infectious diseases. Methods: We searched PubMed and Embase for studies published from January 1-May 25, 2020. We included studies reporting smoking behavior of COVID-19 patients and progression of disease, including death. We used a random effects meta-analysis and used meta-regression and lowess regressions to examine relationships in the data. Results: We identified 47 ...

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