“Yes, smokers do worse”, because you said so...
Vapers get the additional benefit of vaporized propylene glycol which is virucidal.
“because you said so...”
No, because it’s true.
Tobacco and waterpipe use increases the risk of suffering from COVID-19
http://www.emro.who.int/tfi/know-the-truth/tobacco-and-waterpipe-users-are-at-increased-risk-of-covid-19-infection.html
Studies: Smoking, age, other factors raise risk of COVID-19 death
https://www.cidrap.umn.edu/news-perspective/2020/04/studies-smoking-age-other-factors-raise-risk-covid-19-death
Why COVID-19 hits smokers harder
https://www.livescience.com/coronavirus-covid-19-risk-and-smoking.html
Vaping, smoking increases risk of infections from COVID-19
https://www.wwlp.com/news/health/coronavirus/vaping-smoking-increases-risk-of-infections-from-covid-19/
Smokers Face Greater Risk From COVID-19
https://www.medpagetoday.com/infectiousdisease/covid19/85862