Smokers more likely to express ACE2 protein that SARS-COV-2 uses to enter human cells - https://medicalxpress.com/news/2020-05-smokers-ace2-protein-...
They can't both be true
They can't both be true
Your linked study explored a possible reason for the former while this explores the latter.
...lower numbers of COVID cases have appeared amongst smokers compared to non-smokers, even as other reports suggest smoking increases severity of the disease.