“…Contagion can be enhanced by being in physical and visual proximity to those who are ill (1,18,56); the general excitement, including that caused by emergency personnel and equipment (3,5,14,17,24,30,44,50,56,61,63,68,69); the presence of the media (5,27,30,32,50,(68)(69)(70) and reports by them (5,9,10,24,57,69,71); reuniting of the group (5,56,72); litigation or monetary compensation (10,(73)(74)(75); labeling of the illness with a specific clinical diagnostic term (34,73,74,76,77); and the persistence of rumors (56,63,78).…”