Further, the study authors note that smokers are more likely than non-smokers to ‘suffer comorbidities, such as cardiovascular disease, which are risk factors for adverse COVID-19 outcomes.’ They conclude: Considering the above-mentioned uncertainties, the generalized advice on quitting smoking as a measure to improve health risk remains valid but no recommendation can be currently made concerning the effects of smoking on the risk of hospitalization for COVID-19.
(from the linked article)
jgrimez said:
Some of those articles made me roll my eyes pretty hard. Some of the arguments are almost suspiciously desperate to disprove any negative effects of tobacco smoking.
"Because tobacco smoking is not listed as a cause of death on death certificates, how can we claim tobacco smoking is harmful?" -> All-or-nothing fallacy
"Anti-tobacco studies are conducted by organizations with a financial interest in stopping smoking, so they are wholly invalidated!" -> Financial support should not invalidate the results of properly conducted research
"Epidemiology is total junk that makes up claims wholesale and ignores the scientific method!" - Perfect world fallacy.
"Studies on the negative effects of tobacco don't correct for environmental factors!" - Many of them do, actually.
"There are not clearly standardized methodologies to test the carcinogenic effect of tobacco smoke and tars, so all results are invalid!" - Perfect world fallacy.
"Secondhand smoke is not directly lethal, so cannot be toxic or harfmul!" - All or nothing fallacy.
"Sprague-Dawley rats are predisposed to cancer anyway!" - framing effect
"Lung cancer and other smoking-caused diseases already occur in people who don't smoke!" - framing effect, ignores the effect size of tobacco use
... and my favourite ...
"Correlation is not causation!" - as if somehow the elevated risks of COPD and the like from smoking is a non-concern or just coincidence
And some of the quotes... wow.
"No ingredient of cigarette smoke has been shown to cause human lung cancer. No-one has been able to produce lung cancer in laboratory animals from smoking." - Professor Schrauzer, President of the International Bio-inorganic Chemists
"After years of intensive research, no compound in cigarette smoking has been established as a health hazard." - Professor Charles H. Hine, University of California
Big words from people with big titles, but clearly any competent scientist can put two and two together: as one simple example, benzene is a established product of tobacco combustion. Benzene is also carcinogenic, mutagenic, and toxic. Ergo, tobacco smoke can be expected to have carcinogenic properties by way of its compositon. To claim that there are no harmful chemicals in a controlled pyrolysis of vegetable matter is frankly stupid, in my eyes.