Research Paper Volume 15, Issue 11 pp 4625—4641

Figure 3. Collagen depots in patients diagnosed with lung fibrosis post-surgery. (A) Representative images of Masson trichrome, Sirius red (polarized light and bright field) and smooth muscle actine (SMA) staining in non-fibrotic and fibrotic lungs. (B–D) Quantification of Masson trichrome (B), Sirius red (C) and SMA (D) positive stained lung area in non-fibrotic (NF) and fibrotic (F) lung samples. The samples analyzed correspond to Control 1-23 and COVID-19 1-9 (Table 1). Statistical significance was assessed using Student’s t test and the p-value is indicated.