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PTSD may be experienced following any traumatic experience, or series of experiences which satisfy the criteria, and that do not allow the victim to readily recuperate from the detrimental effects of stress. It is believed that of those exposed to traumatic conditions between 5% (life threatening disease such as cancer) and 80% (rape) will develop PTSD depending on the severity of the trauma and personal vulnerability.
In peacetime, 30% of those that suffer will go on to develop a chronic condition; in wartime, the levels of disorder are believed to be higher.
In recent history, the Indian Ocean Tsunami Disaster, which took place December 26, 2004 and took hundreds of thousands of lives, as well as the September 11, 2001 attacks on the World Trade Center and The Pentagon, may have caused PTSD in many survivors and rescue workers. Today relief workers from organizations such as The Red Cross and the Salvation Army provide counseling after major disasters as part of their standard procedures to curb severe cases of post-traumatic stress disorder.
Other agencies, such as the National Meditation Center for World Peace, have created special programs. The NMC trains agencies such as crisis centers NGOs and works with international agencies to prevent trauma to children.