Apparently they prepare dead bodies by hand, which would involve touching the body.
The Spanish case was a nurse in the same hospital as an Ebola patient.
The two Americans had to agree to the treatment because it hasn't been tested. One was very close to dying, so basically had nothing to lose. The less ill aid worker took longer to recover, strangely enough. It meant injecting a small dose of ebola into mice and then extracting the antibodies...