Like cigarette smoking, after cessation of waterpipe tobacco exposure, the risk of death from all causes and all types of cancers decreased rapidly and statistically, consistent with another study 6
I am not unhappy with my regular tobacco at any rate
A prospective trial, identifying smokers and non-smokers now, and following them in the future to see if they acquire COVID-19 and their outcomes would be the definitive way to attempt to establish causation. Galiatsatos explained that he and his colleagues in the School of Medicine and the School of Public Health at Johns Hopkins have been working on a massive systematic review of all the publications put out [on the subject] so far, and based on their analysis, he said, weve found that those who smoke are more likely to suffer more severe symptoms of COVID-19. The finding isnt surprising, he said, because its what weve known all along: People who smoke tend to have worse outcomes from infection. Jeffery Drope, the scientific vice president of economic and health policy research for the American Cancer Society (ACS), has arrived at the same conclusion

Another similar study linked poor sleep adequacy in adolescence with subsequent increased smoking behavior through delayed reward discounting mechanism due to adverse childhood experiences [63]