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There are definitely so many things we can do to help our lung healing and capacity. Check out the courses section for detox and this one in specific though its under childhood illness it can apply to adults as well
https://tribe.thewarriorcenter.com/lessons/the-4-as-autism-adhd-allegies-asthma/
Tree oils are fantastic for lung function, red cedar bliss in a capsule can also be helpful, longevity, ningxia, and helichrysum in a capsule.