Smallpox killed people for centuries. In 1977, a sea plane carrying a medical team from the World Health Organization descended on a place called Bola Island, nestled in the world's largest delta. Their mission, monitor and eradicate a deadly and highly contagious virus, first documented in China and easily spread by droplets from a cough or sneeze. This is the story of eradicating smallpox. Dr. Larry Brilliant would go on to co-found the Seva Foundation treating blindness and later lead Google's worldwide philanthropy.