The good thing, if such a phrase can be used in this case, is that Ebola is only transferred by bodily fluids, it's thankfully not airborne.
So really only blood, vom, keech, semen and the like in direct contact with you for you to catch it.
Hypochlorite solution is amazing it destroying genetic material, Ebola is a wee strand of RNA stuck in a protein shell, so the bleach solution kills it off nicely.
So for surface treatment of folks leaving an infected area the garden scoosher is ideal as it is a controlled delivery of a concentration of your choice.
Problem with a shower would be the massive volume of dilute viral suspension that you would then have to deal with.
It is an issue, but it pisses me off no end how much this has been made a huge thing by the media recently, same as Bird Flu and SARS.
The microbiologist in me shudders at the misinformation about it all...