My friend has Cystic Fibrosis and he is 14 years old, and i will be 14 in june, and i want to donate one of my lungs to him when i get to the age i am able to. What age do i have to be to donate a lung? Will i be able to function normally with one lung? Will it make his Cystic Fibrosis better?

Summarized question: Is cystic fibrosis curable in a 14 year old?