ED is an awesome rotation to do, especially if it is at a major trauma hospital. You will get to see a ton of things that you barely talked about in school. While ID can seem really interesting, it is kind of boring(at least to me). A lot of the information is based on infection location, typical bugs, hospital antibiogram, and C&S results. Thus, while you will learn a lot, most of it will be information you are reading from a resource and memorizing. Additionally, you can get ID experience during any inpatient rotation, as ID starts from the second an infection is suspected/diagnosed until the patient completes therapy or is discharged. However, you are not going to have many opportunities outside of the ED getting to experience how to handle traumas, overdoses, strokes, MIs, etc. You are paying a lot for your rotations and you only get a few, so do not let irrational fear prevent you from an experience that can be greatly beneficial.