Mass Shooting: How Entire Community Experiences Trauma

A vigil in Stratford, Conn. for the victims of the mass shooting at Sandy Hook Elemtary School
(Image credit: Video screengrab/CNN)

Post-traumatic stress disorder is usually thought of as a condition of individuals. But mass-shooting tragedies like the one that happened in Newtown, Conn., last week can cause a community to experience collective traumatic stress, experts say.

After such events occur, about 10 to 15 percent of people in the community will have symptoms of post-traumatic stress or depression, said James Hawdon, a professor of sociology at Virginia Tech University, in Blacksburg  where a mass shooting occurred in 2007. But there is also a broader effect on the community.

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Rachael Rettner
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Rachael is a Live Science contributor, and was a former channel editor and senior writer for Live Science between 2010 and 2022. She has a master's degree in journalism from New York University's Science, Health and Environmental Reporting Program. She also holds a B.S. in molecular biology and an M.S. in biology from the University of California, San Diego. Her work has appeared in Scienceline, The Washington Post and Scientific American.