U.S. State Department for years has been trying to clamp down on missionaries going overseas without proper shots, training and equipment. There's also a number of third world countries asking them to not come if they're not going to have their medical support staff. I believe most countries now require a special Carnet (I'm sure I spelled that wrong. It's a special visa/document for goods/merchandise) to even bring in medical supplies to a country. Gotta apply for them months ahead at embassies. Depending on the country you either pay a steep import tax or get it confiscated.