Another therapeutic study found that natural mutations in the TLR7 gene encoding expression can actually affect disease severity and mortality in young sufferers with COVID-19, thus demonstrating that TLR7 is involved in SARS-CoV-2 infection and recognizes the virus as a candidate therapeutic target (van der Made et al., 2020; Solanich et al., 2021). The gene discussed is TLR7; the disease is COVID-19.