(Just for context, I'm a midlevel practitioner at a night clinic – essentially a standalone emergency department, but only open overnight. In a pretty rural area)
For me, it's altitude related medicine. The capital city of my country is where almost all tourists fly into. The elevation is very low there, within a few meters of sea level.
That area ("the valley") is really the only place where the elevation is that low, and some tourist areas in the valley that are even at & below sea level. Many tourists will take buses to outlying cities, one similar city is the nearest big city. Some drive to one of the major trailheads then start hiking, one of which is in my village. Whatever. The clinic is around 1500m in elevation. It's right at the range where people start to get sick, but patients are often descended from nearby higher altitude villages to us.
At least once a week we get tourists with altitude illness. It's scary to me, seemingly stable patients can get unstable quickly, occasionally we have to use Gamow bags which are difficult to work with, have to keep patients for a while, just not fun.
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