4-year-old Vihaan is an active boy. This thalassemia survivor received a bone marrow transplant from a young man in Kerala, Anuroop, who was a perfect stranger - and a perfect match. A year on - the donor and the young boy whose life he helped to save 'meet' each other on NDTV for the very first time. Vihaan's mother describes Anuroop as their superhero donor - as the young man describes feeling super-excited. Be a witness to the meeting as the donor, Vihaan's family, the doctor, and the coordinating NGO talk to NDTV's Maya Sharma.