Illegals and various other indigents routinely use emergency rooms as primary care facilities. They show up in the ER when one of their 10 kids has a sniffle, slowing down the triage for patients who are there for actual emergencies.
Plus when you are standing next to them in line at the pharmacy you don't know what that cough is that they have...tuberculosis or black plague that should have been blocked at the border. I've noticed allot of them wear masks walking around the facilities.