Molecular communication is a new communication paradigm using molecules as a communication carrier. In molecular communication, information is encoded onto molecules at senders and the molecules propagate to receivers in a controlled manner. The receivers, upon receiving the molecules, decode the encoded information and react biochemically. Molecular communication provides means to deliver molecules to destinations and allows biological and artificially-created components to communicate with each other. This paper describes a design of a molecular communication system that has potentialities to enable future health care applications.