Of note, when comparing asymptomatic versus symptomatic COVID-19 patients, Montalvo-Villalba and colleagues found that in the early inflammatory phase of the immune response against the virus, symptomatic patients presented lower transcript levels of TGF-β1 and the regulated upon activation, normal T cell expressed and presumably secreted (RANTES) protein in the upper airway. This evidence concerns the gene TGFB1 and COVID-19.