El-Saed, Aiman, 1 Department of Infection Prevention and Control, King Abdulaziz Medical City, Riyadh, Saudi Arabia 2 King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia 3 Gulf Cooperation Council (GCC) States and WHO Collaborating Center for Infection Prevention & Control, 4 Community Medicine Department, Faculty of Medicine, Mansoura University, Egypt, Saudi Arabia