Additionally, growth factor TGF-β1 and myofibroblast markers α-SMA were variably expressed in tissue areas with the COVID-19 marker expression in fibrotic and non-fibrotic areas of IPF lungs (Figure 4, bottom panel) and “smooth muscle like” lesions and normal alveolar areas of LAM lungs (Figure 5, bottom panel). This evidence concerns the gene TGFB1 and idiopathic pulmonary fibrosis.