Emergency room to the intensive care unit in Hajj. The chain of life.

Hajj, which brings more than 2 million Muslims together, represents a special challenge for healthcare services especially the intensive care unit. The main goal for healthcare providers is to provide the best service to the largest number of patients with the available resources. The purpose of this article is to outline the admission criteria from the emergency room to the intensive care and to review some of the unique features of providing these services during the Hajj season.