Khani, Ali, Farnoosh Ebrahimzadeh, Alireza Mohammadzadeh Shabestari, Parisa Eshaghizadeh, Soheila Aminzadeh, and majid taati moghadam. “An Investigation of the Successful Efforts of Iran in Decreasing Delta Variant of COVID-19 After about Two Years of Conflict With COVID-19 Pandemic”. Iranian Red Crescent Medical Journal 24, no. 4 (April 17, 2022). Accessed February 9, 2023.