I had to take my adult son to A and E when he became so dizzy he couldn't stand up. DiL doesn't like hospitals so asked me to take him. When I picked him up he was wearing a beanie hat, old t shirt, frayed jeans and crocs, he had been working on the bathroom floor. Getting him into the car was difficult as he could barely move.
A and E took one look at him and assumed he was drunk, or a drug addict, without even examining him. When I insisted they couldn't ignore him, they directed us to the GP triage service across the car park.
We were beginning to get the same reaction there, but I think the combination of my sadly rather cut glass accent, and the fact that his occupation was an actuary meant at last we did get in to see a doctor. He was furious that A and E had rejected him and I had had to drag him across the car park in a wheel chair. (They had refused to let me use one of their wheelchairs) Turned out he had a raging ear infection which had gone into his inner ear, hence the loss of balance.
So even hospitals can be guilty of prejudging!