There's this paper: https://onlinelibrary.wiley.com/doi/pdf/10.1111/all.14238 https://onlinelibrary.wiley.com/doi/pdf/10.1111/all.14238 "Low prevalence of smok

There's this paper: https://onlinelibrary.wiley.com/doi/pdf/10.1111/all.14238 https://onlinelibrary.wiley.com/doi/pdf/10.1111/all.14238 "Low prevalence of smokers, and no allergic diseases despite of drug hypersensitivity and urticaria was self-reported by any patients, indicating that allergic diseases and smoking history may not be the susceptible factors for COVID-19." And this one: https://www.medrxiv.org/content/10.1101/2020.02.05.20020107v2 https://www.medrxiv.org/content/10.1101/2020.02.05.20020107v... "Together, this study indicates that smokers especially former smokers may be more susceptible to 2019-nCov and have infection paths different with non-smokers." They reach opposite conclusions.