Because the scarlet fever releases exotoxins into your body... The rash is your body's allergic reaction to those exotoxins. And it usual takes six to nine days for your body to remove the exotoxins so that is why the rash stays for so long... hope this helps.
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.