We camp at an event that is close to 90 miles from the nearest emergency care by road in a very rural area. It is about the same distance by air to the nearest trauma center. The event organizers carry a sat phone and there is cell service now.
There are notices at local businesses in the nearby little town from the Sheriff stating that it will take a minimum of 45 minutes to get emergency help. Even a helicopter will take 45 minutes or more. If you are sick enough to need an ambulance ride to the hospital there is a good chance you'll be getting a helicopter ride. (I should check if my insurance would cover a helicopter.)