A Kenyan startup Snark Health is helping patients cut healthcare costs using an application that monetizes their data and connects them with doctors. The mobile application, allows users to pay for medical services by selling their personal data through blockchain technology, and has attracted more than 300 doctors and 4,000 users.  Officials at Snark Health's Hippocratic Coins say this would help address the relatively high cost of healthcare in Africa.  Victoria Amunga reports from Nairobi.