Lungs would always be a donation from someone who died, however sometimes if it's a combined heart lung transplant, the first recipients old heart could be transplanted to a second recipient if it was healthy enough.
Lung transplantation is a surgical option for people with cystic fibrosis who have advanced lung disease. During the operation, diseased lungs are replaced with healthy ones gifted from a deceased organ donor. Median survival for people with CF who have had a transplant has improved.