The very very short answer is because of medical ethics and laws. But every needle today comes prepackaged and sterilized even when that needle is used to kill someone.
Good question. Maybe there is a medical rule or law saying every needle must be sterilised. I honestly don't know.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.