TLR7 and COVID-19: TLR7 levels showed a decreasing trend with increased COVID-19 severity, being lower in patients with moderate disease (β-coeff: -0.45 [95%CI -0.65, -0.25], p<0.001) and further reduced in patients with severe disease (β-coeff: -0.69 [95%CI -0.99, -0.40], p<0.001) compared to those with mild disease.