Contents Issue 1-4 January 2019 Volume 26, Issue 1-2-3-4 , 2019 View pdf Outbreak of acute gastrointestinal illness at a school in Arar, March 2017. Abdullah Bashir Said Al Manji, Mohamed Nageeb Abdalla, Sami Saeed Saeed AlMudarra MERS-CoV outbreak in Wadi Aldawasir General Hospital’s renal dialysis unit, March 2017. Safiah Aldubaisi, Sami Saeed Saeed AlMudarra Health knowledge, attitudes and practices among pilgrims at Prince Mohammed Bin Abdulaziz International Airport in Medina during Hajj 1439H (2018). Eman Elsayed Abd-Ellatif, Sami Saeed Saeed AlMudarra, Asmma Awwad M. AlQusibri, Lujain Alassaf, Lamis AlGhamdi, Alwaleed Abdulhameed Alharbi