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). The gene discussed is TGFB1; the disease is COVID-19.