How important is it for an undergraduate to find part-time or summer work in a hospital setting ?
Medical school admission committees look for ways in which they can be certain that applicants know as much as possible about what they are getting themselves in for. Finding work in a healthcare setting (hospital, nursing home, clinic, etc.) is one way to demonstrate your willingness to help sick people while at the same time familiarizing yourself with healthcare delivery systems. In lieu of hospital work, one might also consider volunteering time to health service agencies such as American Cancer Society, Red Cross, or Mental Health.