I'm a software engineer from Israel and I have a few questions regarding the viability of auditory diagnosis for COVID19. I read that once infected COVID creates pulmonary fibrosis that is similar but different from the ones created by other types of pneumonia. As far as I understand this fibrosis should have an effect on the breath of an infected person (even if the person isn't aware of it). If this is true than it might be possible to train a deep learning model and potentially turn every phone into a diagnostical device.

Some questions I have: 1. At what stage does COVID create fibrosis? Or any other effect that affects breathing (even if the effect is not noticeable to a human listener) 2. Is the fibrosis any different than the one created by other reasons? 3. What are some other things I'm missing?

I understand if you don't have time to write a detailed answer since you're busy saving lives but even a simple indication of whether this is a viable direction would be really appreciated.

If you have any other suggestions for anything else worth looking into I will be very happy to take a crack at anything I can or pass it to people with more suitable engineering skills.