The Epidemiology module presents detailed country-specific information on the status of each disease, both globally and within each relevant country. The current version contains over two million words in 12,000 notes. All data are derived from Health Ministry publications, peer-review journals, standard textbooks, WHO and CDC websites and data presented at conferences. The user may also access over 30,000 graphs which follow disease incidence, rates and other numerical data. The main Epidemiology screen is shown in Figure 5 . Note that the user can append custom "personal notes" -in any national language or font-regarding the status of every disease in their own institution. Such notes would be accessible by all colleagues using GIDEON on the local network.