Association between smoking, e-cigarette use and severe COVID-19: a cohort study
Background Smoking is a risk factor for most respiratory infections, but it may protect against SARS-CoV-2 infection. The objective was to assess whether smoking and e-cigarette use were associated with severe COVID-19.
Methods This cohort ran from 24 January 2020 until 30 April 2020 at the height of the first wave of the SARS-CoV-2 epidemic in England. It comprised 7 869 534 people representative of the population of England with smoking status, demogra... Expand abstract
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- Peer review status:
- Peer reviewed
- Copyright holder:
- Gao et al
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- © The Author(s) 2022. Published by Oxford University Press on behalf of the International Epidemiological Association. 1 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
- CC Attribution (CC BY)
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