I don't know whether this is true or not, but I've checked on unwomen.org and haven't found any information about a "Jehovah's witness" campaign with respect to the ebola crisis.
The other links I find that reference the JWs seem to be reproducing the same information. . . and don't seem particularly reliable. Remember, even though they claim to be "news" it's still Garbage-In-Garbage-Out.
I guess I would be more condfident in the veracity of this report if it was reported on the unwomen.org website itself.