Earlier this year, Nightline shared Leo’s story and his groundbreaking COVID-19 double-lung transplant. Now, go “Inside the OR” to see what happened during the procedure that made headlines around the world.

Leo was flown to Northwestern Medicine for a double-lung transplant after COVID-19 left him on a ventilator, struggling to survive. Join us “Inside the OR” for part two of Leo’s story as the Northwestern Memorial Hospital thoracic team races against the clock to save his life.