why do some people develop PTSD while others do not? 

Hello, this a 1-2 page  assignment Although historically associated with exposure to combat, research during the past few decades shows that PTSD may also occur following exposure to other traumas, ranging from dog bites to hurricanes. If this is the case, you might wonder why there aren’t more people suffering from PTSD. The reality is that not everyone who experiences a trauma will develop PTSD. So, why do some people develop PTSD while others do not?