Volume 28-Issue 3-4-2021 Burden and Associated Factors of Coronavirus Disease (COVID-19) in Al-Buraimi Governorate, Oman-2020. Evaluation of the Cold Chain Expanded Program on Immunization at Governmental and Private Health Care Centers in Riyadh city, Saudi Arabia, 1442H - 2021G Outbreak of COVID-19 among healthcare workers at a Diabetic Center, Al-Ahsa, Saudi Arabia - April 2020. The first Cluster of COVID-19 cases in the Sultanate of Oman in Muttrah District, 2020.