These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Harsher in Hindsight: A real-life outbreak of the Ebola virus occurred in Zaire only a few months after the film was released.
And then, later on, there was bird flu
And for the hat-trick, the most recent outbreak of Ebola in West Africa infected two Americans who were recently (at the time of this posting anyway) brought BACK to the United States. Clearly, no one who made this decision to do this had seen this movie... or any movie dealing with our favorite microscopic mass-murderers.
Nightmare Fuel: Averted, oddly enough. 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. 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 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...