I’m surprised that you even have close to 2 litres volume. Think about it- that highly sensitive vascular lung tissue was hit with high impact force, then scratched and likely punctured to hell by multiple broken ribs, then left to try and function in the absence of a supportive rib cage, then full with infection that clogged whatever pore spaces were left. The fact that they functional at all is really a medical miracle. Even your lungs are special! Dr. Monique Dube