Volume 29-Issue 1-2-2022 The Foodborne Outbreak investigation: Hail city, Saudi Arabia, 2021. A case control study. The Crimean Congo Hemorrhagic Fever Outbreak in North Part of Oman in August 2019 - A Case Series Study. Characteristic of Clorox Poisoning before and during COVID-19 Pandemic, Saudi Arabia, 2019-2020. Delta Variant among increased cases of COVID-19 in Makkah, June 2021.