Hm. Actually, you might be on to something. If the martyr were to explode himself from the inside with grenades, there'd be ebola-carrying gore splattered everywhere.
Don't you think that the extreme temperature, which would be created as a result of the explosion will neutralize the Ebola virus? That said, Ebola is a very powerful weapon if it lands at the hands of extremists. For example, they can dilute the Ebola infected blood and then spray it on metro trains and other crowded places.