Current smoking and COVID-19 risk: results from a population symptom app in over 2.4 million people

In this study of 2.4m users entering data into the Zoe COVID-19 app, current smokers were more likely to report symptoms suggesting diagnosis of COVID-19; classic symptoms adjusted OR (95% CI) 1.14 (1.10 to 1.18); >5 symptoms 1.29 (1.26 to 1.31); >10 symptoms 1.50 (1.42 to 1.58)

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Thorax