Public health communications is a serious concern worldwide. Improved information exchange is the most cost effective means to improve public health. There needs to be access to high quality epidemiological educational data and information as to how best to do research for public health professionals and instructors world wide. Existing Internet based materials on public health awareness, disaster communications, and environmental health are poorly organized, their scientific quality is questionable, and they are often difficult to obtain due to high cost. The Supercourse project (www.pitt.edu/~super1) is a collection of over 3600 lectures on public health, prevention, and Internet, targeting the teacher vs. the student. It is being developed by over 56000 faculty from 174 countries who are sharing for free their best lectures. Just in Time knowledge Supercourse network is currently being developed in order to foster the exchange of high quality prevention information and to create a trusted source of epidemiological information in the area of public health and preparedness. Supercourse project is aiming to close the digital divide through the development of low bandwidth lectures, opening mirrored servers in the developing countries, distribution of Supercourse CDs, and networking public health professionals from across the world. Quality control mechanisms for the lectures are developed based on our unique approach of multilayered quality control. Inadequate public health information exchange among health professionals may lead to poorly trained public health and medical students, inadequate prevention systems, and ultimately sicker population. Global, low cost, low bandwidth, high impact projects like Supercourse are needed to improve public health and preparedness world wide and foster communications between local and global scientists.