What is medical evacuation?

A medical evacuation, as defined by the dictionary, is the emergency transport of one or more people, usually by air, to the nearest health care facility, such as a hospital or a clinic. It is frequently required in life-threatening or other extreme situations in which the individual’s life is in grave danger.

https://www.medical-air-service.com/blog/the-meaning-of-medical-evacuation-in-todays-age_7958.html#:~:text=A%20medical%20evacuation%2C%20as%20defined,life%20is%20in%20grave%20danger.