TERT and pulmonary fibrosis: Although we cannot distinguish between the AAV9-Tert infected and non-infected ATII cells, the fact that 80% of the total AAV9-infected lung cells are ATII cells (Figure 1A), suggests that AAV9-Tert treatment is resulting in increased proliferation of these cells leading to a higher potential for lung regeneration and the remission of lung fibrosis.