Mass gathering medicine

Mass Gathering Medicine is a field of medicine which deals with health effects/risks of mass gatherings, that 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.
Such factors as the weather, duration of the event, movement of the crowd, 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 all influence the health care at mass gatherings.
Purposes of Mass Gathering 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. Mass gathering medicine support requires planning.
The World Health Organization supports Member States hosting mass gatherings.