my son had lung issues since birth he was on vent for 6 months in nicu before being weaned to cpap then to oxygen. He was discharged home at 7 1/2 months home on oxygen, apena monitor, and suctioning of his lungs every 2 hours. His twin brother passed at 11 days because his lungs were so bad and scarred that the vent just wouldn't help. So I think everyone is different. My son is now 12 and still a pain in the butt! LOL