The symptoms of Motaba are basically painful flu-like symptoms followed by death, at least as far as we see. Ebola, on the other hand, is disturbingly horrifying, essentially rendering the body to a barely-living bag of blood as internal organs break down, bleed out, and essentially disintegrate until the host dies. Robby describes the inside of Jimbo's body as looking like a bomb went off inside it. Suffice to say, be glad they didn't show that.
These were supposed to be the symptoms for Motaba too, but except for some bleeding from the eyes, they spare us the Squick of seeing it.
The movie theater sequence, where the sick hospital worker is unwittingly coughing out the airborne version of Motaba, and you get to see how easy it is for that virus to spread. Now imagine watching this while sitting in a movie theater in Real Life.
The trailer. It ends with the Army announcing quarantines of more US cities, from Portland to Chicago. This doesn't happen in the film, but it's still terrifying to hear...
The opening sequence with a fuel air bomb being dropped on an infected mercenary, while lacking the sustained horror of the Motaba virus itself, still manages to be pretty nasty. Particularly the split-second shot we get of a hapless soldier being torn in two by the blast wave, sending entrails flying out of his body before his flesh is burned to ashes. It's almost like Wolfgang Petersen saw the infamous (and then-recent) dream sequence from Terminator 2: Judgment Day that depicted people being graphically ripped apart by a nuclear blast, and thought, "Yeah, that needs more gorn."
The Army fatally stopping a trio of locals attempting to escape in a truck and holding a family in a second vehicle with young children at gunpoint.
It ends with the Army announcing quarantines of more US cities, from Portland to Chicago. This doesn't happen in the film, but it's still terrifying to hear...