Very long time ago, Anna Freud suggested that the word "trauma" is over used, while it actually refers to an event that is shattering and devastating to psyche. In the time past since then, we know that trauma in not necessarily an event, and adversed prolonged experience can be traumatizing.
After researching the field of trauma a few years ago, I co-wrote a paper about trauma which, was presented and then published. Ever since, I felt called to see patients suffering from the consequences of a traumatic experience, single event, or life circumstances. Unfortunately, my people, in my homeland, Israel, had suffered a barbarian massacre which severely traumatized many people. Since that black Saturday of Oct. 7th, I am working with the survivors, adults and children, trying to ease the pain, and minimize PTSD, and teach therapists Psychological First Aid, and Trauma Work. 
You can find an article I wrote about this work I do with the survivors, here: