Hi  - I can only share with you my own interpretation of what I read from the VA literature.  I am going to post a link you may need to copy and paste into your browser:  https://www.va.gov/disability/eligibility/         Among the things they mention in that site are "Breathing problems resulting from a current lung condition or lung disease" but it appears you need to link them to your service to qualify.  I would suggest taking a look at that website and reading it carefully to see if you think that your situation would qualify under their requirements.  Keep us posted, I hope you are able to qualify!  ~Melanie (team member)