RUPRECHT KARLS UNIVERSITÄT HEIDELBERG Department of Tropical Hygiene and Public health Master of Science in International Health Using PDA Phone for Reporting Notifiable Diseases in Yazd, Iran to Improve the Reliability and Timeliness of Aggregated Data Author: Farhad Fatehi, MD Thesis Supervisors: Darcey Terris, MBA Prof. Thomas Wetter Prof. Rainer Sauerborn September 2006