My Answer:
I can't really make the whole presentation for you, but I do take medical subjects very seriously. So I'd say as advice is 1: tell your friend u ain't doing their whole ah presentation, or 2: find a templet for your brochure on a good and free website like venngage.com, and start from there. Then look up your initial subject; organ donation to raise awareness and increase the number of registered donors. Then spiderweb from there writing down notes and such to fill in your templet. Once you are done- there you have it.. your brochure designed to raise awareness and increase the number of registered donors.
Your welcome.