Abstract
The REACH Trial is a 4-year randomized controlled trial to systematically compare the effectiveness of mobile (SMS) and traditional (email, FAX) communication strategies for sending public health messages to health care providers. The objective is to identify the most effective modality for public health agencies to communicate time-sensitive information and improve emergency preparedness and response. We will share preliminary results of intent-to-treat analyses regarding rate of recall of study alert message content, perceived trustworthiness and credibility of message and message source by providers, and frequency of accessing online alert information between traditional and mobile delivery groups.