Very ineffectively. If you really want answers, get this book from your library: "Disease. The extraordinary stories behind history's deadliest killers."
Author is Mary Dobson and the ISBN is 978-1-4351-5166-6 It's a fairly recent book, so the library may have to check around to find a copy for you.
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.