It is worth mentioning that some studies and recent preprints have also reported ACE2 expression profiles in the human lung (Uhal et al., 2013; Chow and Chen, 2020), while our study aims at having a more systematic assessment that includes not only ACE2 but also TMPRSS2, a newly confirmed protein required for COVID-19 entry. The gene discussed is TMPRSS2; the disease is COVID-19.