Epidemiology and Health System Journal (Epidemiol. health system j., EHSJ, eISSN: 2980-7891, https://ehsj.skums.ac.ir) (former International Journal of Epidemiologic Research, IJER. Old eISSN: 2383-4366) is a multidisciplinary journal that publishes Original Articles, Review articles, Meta-Analyses, Editorials, Letters to Editors, and Brief Communications related to all aspects of Epidemiology such as Molecular Epidemiology, Environmental Epidemiology, Occupational Epidemiology, Infectious Diseases Epidemiology, Pharmaceutical Epidemiology, Medical Epidemiology, Genetic Epidemiology, Oral Epidemiology, Pediatric and Perinatal Epidemiology, and other approaches to epidemiological studies. The journal is a refereed, scholarly, and quarterly one affiliated with Shahrekord University of Medical Sciences that attempts to inform people worldwide of the latest epidemiologic and health issues, provide a forum for data analysis and interpretation, and serve as a vehicle for sharing statistics and research on both national and international bases. Researchers are encouraged to submit their articles to this journal according to its aims and scope.