Being an ICP is different than being an infectious disease nurse. There are physicians who specialize in infectious diseases, and some hospitals have floors specifically devoted to this specialty. An infectious disease nurse would work in this type of environment.
However, infection control professionals can be nurses, epidemiologists or medical technologists. We deal with adherence to state, OSHA and Joint Commission requirements. ICPs generally do not do direct patient care, rather the work is more administrative in nature. There are tremendous opportunities for staff education if you like this sort of thing. There is a professional society called APIC
www.apic.org if you want to learn more.