"The difference with Covid 19, is that the lining of your lungs can be permanently damaged. Surface area, and fibrils can be gone."--have you looked @ aviptadil/RLFT?? That is what their drug is doing ,repairing that damage. It is in PHIII fort covid and they have easy access for RTT (on the NRXP website). Downside it is IV
The unknown is their inhaled formula--that is in >>1 trials. If it works that could be game changer for covid lung damage (hopefully)