The trekking company guides are generally pretty good at first aid. Often someone in the group has a medical background as well.

That said, if you are really ill they will have to either stretcher you out – which they will do if in striking distance – say a day or so of either end – or get in a fixed wing to one of the main central villages (Naduli, Kagi, Effogi – don't know if Menari is operational – it needed a mow last time I was there) - or a chopper. The choppers ask for a lot of money per hour usually paid up front.

So someone is going to need big pockets if there is a serious mishap. Although satellite phones are very common now, the radio system from the villages is not reliable.