en Epidemiology Epidemiology Debate Article Debate Article <strong>&nbsp;&nbsp;</strong>&nbsp; Molecular epidemiology is a subdivision of medical science and epidemiology that emphases on the involvement of potential environmental and genetic risk factors, recognized at the molecular level, to the etiology and avoidance of sickness through populations. This arena has developed from the combination of molecular biology and traditional epidemiological research. Molecular epidemiology can improve our knowledge about the precise pathogenesis of disease through recognizing particular pathways that affect the risk of developing the disease. Furthermore, it tries to find how the collaborations between genetic characteristics and environmental exposures works in disease occurrence.<br> &nbsp; molecular biology, epidemiology, 312 316 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-3607-1&slc_lang=en&sid=1 Maryam Honardoost marymail79@gmail.com 200319475328460038333 200319475328460038333 Yes Endocrine Research Center, Institute of Endocrinology and Metabolism, Iran University of Medical Sciences, Tehran, Iran. Azam Rajabpour marymail-58@yahoo.com 200319475328460038334 200319475328460038334 No Molecular Medicine Department, Faculty of Medical Science, Qazvin Medical University, Qazvin, Iran. Ladan Vakil paya_ka@yahoo.com 200319475328460038335 200319475328460038335 No Molecular Medicine Department, Faculty of Medical Science, Qazvin Medical University, Qazvin, Iran.