You can get clinical experience with sick people through the workplace, for class credit, data gathering for a clinical trial, or via volunteerism. It can be gained at a free, family-planning, or private clinic, hospice, hospital, VA, residential home, rehabilitation facility, nursing home, as a first responder, among others.
Clinical patient experience is not always gained in a clinical environment, eg EMT, battle field medic, home hospice care, physical therapy aide, special camp environments. In such a case, you also should acquire some experience in a clinical milieu where doctors work, like a hospital, surgicenter, clinic, nursing home.
The advantage of gaining clinical exposure through volunteerism, is that it also is looked on as community service, another unwritten requirement for your application.
That said, adcomms also like to see hands-on, nonmedical/noncampus community service too.
How are you with the research, leadership, teaching, sports, artistic endeavors, and hobbies, which are other potential categories to put your experiences under?