Some changes were noted in the number of isolated cells from specific epithelial and fibroblast populations, with an apparent increase in AT2 epithelial cells, ciliated epithelial cells, Col13a1+ and Col14a1+ fibroblasts upon infection at d8, with the number of Col14a1+ fibroblasts appearing to remain high at d12 (Fig 5E and 5F). This evidence concerns the gene COL13A1 and infection.