Current smoking and COVID-19 risk: results from a population symptom app in over 2.4 million people.
Nicholas S HopkinsonNiccolo RossiJulia El-Sayed MoustafaAnthony A LavertyJennifer Kathleen QuintMaxim FreidinAlessia ViscontiBen MurrayMarc ModatSebastien OurselinKerrin SmallRichard DaviesJonathan WolfTim D SpectorClaire J StevesMario FalchiPublished in: Thorax (2021)
These data are consistent with people who smoke being at an increased risk of developing symptomatic COVID-19.