<unk> , also known as event<unk> , crowd<unk>  or<unk><unk>  health, is a field of<unk>  that explores the health effects/risks of<unk><unk> s and the strategies that contribute positively to effective health services delivery during these events. The reason for the development of the field of<unk>  gives the fact that<unk><unk> s generate a higher incidence of injury and illness, may be the subject to a catastrophic accident or attack with large numbers of injured or dead persons.<unk>  is viewed as a niche field of prehospital care in emergency<unk>  at the University of British Columbia. Among factors influencing on the demand for the health care at<unk><unk> s are: *the weather, *duration of the event, *if the crowd moves, *containment of the event (fenced/contained or not), *availability of alcohol/drugs, *the density of the crowd et al., *possibility for spreading of communicable diseases Key purposes of<unk><unk>  Medical Services at an event are: *rapid access to the injured or ill patients, *effective stabilizing and transporting injured or ill patients, *on-site care for minor injuries and illnesses. The Department of Global Alert and Response of the World Health Organization supports Member States hosting<unk><unk> s. As the acknowledgement of growth in the area of<unk> , there is a need for consistency in the research and evaluation of<unk><unk>  events. This is important because<unk><unk> s may impact on health services and having a collective understanding of the impact of<unk><unk> s on health services may mitigate any poor outcomes for patients.<unk>  support requires planning in advance. Medical journal The Lancet held a conference on<unk>  in October 2010 in the Kingdom of Saudi Arabia. In 2015, This Is Life with Lisa Ling filmed an episode featuring<unk>  with event medical specialists Dr. Andrew Bazos and Connor Fitzpatrick of CrowdRx, Inc. The inaugural<unk>  Summit was held in New York City on April 21–22, 2016. The fourth annual<unk><unk>  Medical Summit will be held in Las Vegas on March 15–16, 2019
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