Last year, Kristen Johns, Partner at Waller joined us to provide an intro to blockchain in healthcare - what it is and some of the applications to the industry. In this conversation Johns returns to give an update on the blockchain landscape a year later and define a few more of the terms (public vs private blockchain, permissioned vs permissionless). From there, Sean O'Brien, Founder of OMNY Health joined us to talk about why his company built a supply chain management system on a blockchain. Together, we discuss the usual concerns: what's real, what's hype, where is distributed ledger technology headed, and when it might - or might not - be the right option for a company to build on.