We had a similar experience (sort of) in the UK earlier this year. We had a 4 day stopover, and my daughter was sick with a fever and throwing up after getting off the plane. My wife took her to the emergency room, where she received top-knotch care from sympathetic and helpful medical staff. She received prescription antibiotics, and the entire process cost us a total of £0. Healthcare in the UK is free for children, whether they are citizens, residents, or visitors. We were really impressed and appreciative. Thanks, UK taxpayers!
I imagine that there's some limit, like maybe only emergency room visits are covered for visitors or something like that. Still, the process was simple, the staff were helpful, and my daughter got what she needed and she was fine as soon as the antibiotics kicked in.