This is a logo that I created for this contest created by 
Project and a Logo Contest! [Over $800 in rewards!]
Theme: When designing your logo for MedBlock, think of the best way of visualizing an electronic health record (EHR) system on the blockchain. You can also picture MedBlock as Medicine on the Blockchain. Impress me with your imagination!
I focused on the traditional medicinal cross, but at the same time, I wanted to show a chain of "blockchain". And this is what came out! Two interlaced chain links, creating a cross.
My BitShares username: em3di | #381270