(Linda Geddes/ The Guardian) — Smokers are 60%-80% more likely to be admitted to hospital with Covid-19 and also more likely to die from the disease, data suggests.
A study, which pooled observational and genetic data on smoking and Covid-19 to strengthen the evidence base, contradicts research published at the start of the pandemic suggesting that smoking might help to protect against the virus. This was later retracted after it was discovered that some of the paper’s authors had financial links to the tobacco industry.
Other studies on whether smoking is associated with a greater likelihood of more severe Covid-19 infection have produced inconsistent results.
One problem is that most of these studies have been observational, making it difficult to establish whether smoking is the cause of any increased risk, or whether something else is to blame, such as smokers being more likely to come from a lower socioeconomic background. (…)