<human>:  Why do some people develop PTSD while others don’t?
<bot>: It’s a complex question. There are many factors that go into it. Some people who experience traumatic events may not develop PTSD because they have strong coping mechanisms and good social support. Also, the type of traumatic event is very important. If someone experiences a trauma like a car accident, it’s very likely that they will develop PTSD. On the other hand, if someone experiences a trauma like a terrorist attack, they are much less likely to develop PTSD.