It's an American term. There is now evidence that the children of survivors inherited physiological trauma epigentically.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6720013/

https://www.theguardian.com/lifeandstyle/2014/mar/15/trauma-second-generation-holocaust-survivors

You can google it.

And the reason I used that was to identify who I am - a Jew with a good knowledge of the holocaust. Otherwise, as a writer, I get even more flack - justifying what is happening now as a result of the holocaust.