An estimated 70,000 people worldwide have cystic lung . It causes fluid to enter the lungs , making it very difficult to breathe . Gunnar Esiason was diagnosed with it when he was 2 . Now 23 , he says the disease has taught him to be resilient .
An estimated 70,000 people worldwide have cystic fibrosis . Disease causes mucus to clog the lungs , making it very difficult to breathe . Gunnar Esiason was diagnosed with CF when he was 2 . Now 23 , he says the disease has taught him to be resilient .