Mass religious gatherings events and COVID-19 –easing of COVID-19 restrictions and a staged approach to scaling up the Umrah Pilgrimage

Al-Tawfiq, J. A., Memish, Z. A., & Zumla, A. (2021, March 1). Mass religious gatherings events and COVID-19 –easing of COVID-19 restrictions and a staged approach to scaling up the Umrah Pilgrimage. Travel Medicine and Infectious Disease. Elsevier Inc. https://doi.org/10.1016/j.tmaid.2021.101986