Why Contagion is still the most realistic virus film out there

Those who know me will know that aside from my ridiculous obsession with all things film, I'm also very into viruses... not in a funny way, obviously. I'm fascinated by them and have been itching to do a listicle 'best of' one day soon. But until then, here is why Steven Soderbergh's Contagion is by far the best and most realistic virus movie to come out of Hollywood.