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To the Editor
According to several reports, peer-reviewed or in preprint servers, smokers are under-represented among individuals tested positive (reverse transcription (RT)-PCR) for SARS-CoV-2 and diagnosed with COVID-19. Hippisley-Cox et al 1 also report a markedly reduced prevalence of light, moderate and heavy smokers among those tested positive for SARS-CoV-2 or admitted to an intensive care unit, findings similar to those reported by de Lusignan et al.2 The association does not seem to be dose-dependent/exposure-dependent,1 unlike the usually dose-dependent/exposure-dependent smoking–health disorder associations. These findings led to the hypothesis that, …
Contributors IB is the sole author of this letter.
Funding The author has not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient and public involvement Patients and/or the public were not involved in the design, or conduct, or reporting, or dissemination plans of this research.
Patient consent for publication Not required.
Provenance and peer review Commissioned; internally peer reviewed.