COL1A1 and COVID-19: Although the gene expression of COL1A1 assessed by real-time PCR was increased in the COVID-19 H7 (4.36 ± 2.9; n = 7) and compared to the control (1.01 ± 0.21; n = 3), we did not observe the statistical difference (p = 0.143), probably due to the low number of samples analysed.