<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 develop PTSD after experiencing a traumatic event, such as a car accident, while others develop it after a less traumatic event, such as a divorce. There are many different types of PTSD, such as Acute Stress Disorder (ASD), Acute Stress Reaction (ASR), and Complex PTSD.