The Hot Zone by Richard Preston?

I need some ideas on what I should make the poster about based on the book "The Hot Zone." I was thinking about including some of the symptoms or effects (along with pictures) that the four viruses trigger (Marburg, Ebola Zaire, Ebola Sudan, and Ebola Reston), but I just curious if anyone who has read the book had other ideas on what I should make the poster about?