Why the COVID-19 Is Not Significantly Reduced in Iran? - Asgharzadeh, Mohammad; Mahdavi Poor, Behroz; Asgharzadeh, Vahid; Pourostadi, Mahya; Samadi Kafil, Hossein; Vegari, Ali; Taghinejad, Zahra; Bairamy, Adel; Rashedi, Jalil (Iranian Journal of Public Health, 2021)