Social media may be considered by many to be a modern-day villain, but there's no denying that it can work to advantage sometimes. For a 13-year-old girl from Assam, Facebook, quite literally, helped save her life.

Sometime at the beginning of November, Sunali Dhan had been bitten by an unknown snake and was treated at Dibrugarh Medical College in Assam. She was discharged after three days, but suddenly the area around the bite had started developing gangrene. The girl needed urgent surgery on her leg, but her family had no money.