"EPIDEMIC COLLAPSE".
D003291:Conversion Disorder; D003937:Diagnosis, Differential; D006261:Headache; D006801:Humans; D006985:Hyperventilation; D007046:Hysteria; D012769:Shock; D013575:Syncope; D014636:Valsalva Maneuver; D014777:Virus Diseases
DIAGNOSIS, DIFFERENTIAL; HEADACHE; HYPERVENTILATION; HYSTERIA; SYNCOPE; VALSALVA'S MANEUVER; VIRUS DISEASES