Document Type : Letter to Editor


1 1Center for Healthcare Data Modeling, Departments of Biostatistics and Epidemiology, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran

2 2Department of Medical Informatics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran



A "prevention paradox," according to Thompson, is a type of prevention that has many benefits for the entire population but may not be as beneficial to each individual as it is to the entire community. COVID-19 is one of the most mysterious developing viruses in history, capable of being transmitted from one person to another mostly through breathing. If we do not follow specific advice, such as wearing a face mask, we will all become infected very rapidly. To save the lives of a small percentage of the population, millions of people should wear face masks.


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