Lippi and Henry1 searched PubMed and Web of Science up to 9 March 2020, and identified
5 studies2-6 with data on smoking and severity of COVID-19. They performed a meta …

Background The association between current tobacco smoking, the risk of developing
symptomatic COVID-19 and the severity of illness is an important information gap. Methods …

Introduction Preliminary reports indicated that smokers could be less susceptible to
coronavirus SARS-CoV-2, which causes Covid-19. However, once infected an increased …

Methods: articles from MEDLINE and pre-prints published from January to April 2020 were
identified. Results: data from China showed that men had more severe outcomes of COVID …

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 …

SARS-CoV-2 is a new coronavirus that has caused a worldwide pandemic. It produces
severe acute respiratory disease (COVID-19), which is fatal in many cases, characterised by …

Background The harms of tobacco use are well-established. Tobacco causes 8 million
deaths every year from cardiovascular diseases, lung disorders, cancers, diabetes, and …

Introduction Current evidence indicates that smoking worsens COVID-19 outcomes.
However, when studies restricted their analyses to current smokers, the risks for COVID-19 …

[COVID-19 and Smoking: A Systematic Review and Meta-Analysis of the Evidence]. - Abstract -
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Introduction Smoking causes inflammation of the lung epithelium by releasing cytokines and
impairing mucociliary clearance. Some studies have linked smoking with severity of illness …