HRA is examining emergency preparedness communication for two particularly vulnerable populations: Deaf/hard-of-hearing and older adults. Few emergency preparedness communications are directed to these groups, both of which have complex communication needs. The project is part of a nationwide effort to evaluate and improve public health preparedness and response systems. In conjunction with both a National Advisory Board and a local Community Advisory Board, HRA is assessing and improving the content, format, and delivery of preparedness materials and evaluating their effectiveness.