Transmission of targeted health information “in which separate audience segments (often demographic categories) benefit from a shared message.” Targeted communication can also be further customized according to an individual’s specific needs, resulting in “tailored client communication,” whereby message content is matched to the needs and preferences of an individual. The communication can be unidirectional and bidirectional, but initial contact is from the health system; as opposed to on-demand information service where the client initiates the first contact to the health system. @en