We call that work missions . Not something we'd like to get involved with. Most missionaries that I know are not like that. They want to love God with all their heart, soul, mind and strength. And they want to love their neighbor as themselves.
Mission starts with the Great Commandment.
Offering medical care. Once in a while you get some adventures, but if you ask missionaries what they actually do every day, it tends to be very ordinary stuff. There are plenty of needs here, right in our own back yard. And we should be attending to them. Missions start wherever God shows us a special need.