1. Johns Hopkins University and Medicine. Coronavirus COVID-19 Global Cases, 4 December 2020. Johns Hopkins University and Medicine; 2020.
2. Arab countries brace against COVID-19
3. Ministry of Health. COVID-19 command and control center: the national health emergency operation center, 4 December 2020. Saudi Arabia: Ministry of Health; 2020.
4. Al Amir K Coronavirus: Saudi Arabia Confirms 355 new COVID–19 cases, 9 April 2020. World Gulf; 2020.
5. World Health Organization. Rolling updates on coronavirus disease (COVID-19), 7 April 2020. World Health Organization; 2020.