The next question is, will they. I know of a town in Indiana where a surprising number of people don't get medical help. Some of it is money, but a big part is cultural. Indianapolis scares them. I dare say, for too many Indianapolis is scarier than COVID-19.

Depends on the disease.

Something like a stroke requires immediate action (say, within 2 hours) to be able to use the best treatments available. Living very far away from a good hospital makes your survival chances quite lower.

For Covid-19, as far as I read, some people have gone to the hospital (already having trouble to breath) and died after a few hours. But those seem extreme cases. Normally you would have a couple days to go to the hospital from the moment you realize something is odd.