Verkkofor survivors and witnesses of mass shootings, suffering tends to be particularly severe. Studies have documented increases in posttraumatic stress. Verkkoother studies 12,40,44 have shown reported rates of ptsd ranging from 18% to 42% at 1 to 6 months after injury and 2% to 36% at 12 months after. Verkkosome who witnessed the attacks on the world trade center are still suffering from ptsd and depression from the trauma. Help and treatment are. Verkkothe violence of the oct. 7 attack triggered some survivors around the world, and in the 10 months since, antisemitism in the united states has reminded survivors of childhood persecution, causing.