There's far more to it than just the bags, of course - she also had saline solutions, and knew how to administer them. Ebola patients get dehydrated.
Saline solution is simple to make. 0.9 parts salt (table salt), 99.1 parts water. But she was able to get it from a local clinic, even though they would not take her family members in for care.
Comments are open, but moderated, for the time-being. Good luck.