(Video source: VCG)

Cullen Potter, a baby  from Alabama, born at 22 weeks and only 13.9 ounces (about 0.79kg), was treated at a US hospital's Neonatal Intensive Care Unit. The doctor said Potter had a 2% chance of survival, but after five months' treatment, the baby was out of danger. Nurses and doctors held a "graduation ceremony" to celebrate the cub's recovery.