Inside the life of a COVID long-hauler who "fought like an animal" to make it out of the hospital after 299 days

The past year has seen some dramatic swings in America's fight against COVID-19. But while the number of COVID cases are trending downward, some long-haulers are having a hard time recovering from the disease. 

Alex Castro of Sandy, Oregon, used to be able to swim, cook and hike, but now it takes every breath he has and baby steps, to just walk across his living room. 

At 44 years old, Castro is just a shell of the man he used to be. COVID caused him heart failure and ravaged his kidneys and lungs.